Heavy Duty Padlock

2,209 Reviews Scanned

In order to provide you with accurate and valuable pieces of information and reviews, we have conducted in-depth research for the best heavy duty padlock of 2024. In addition, you will find our top picks and highest-reviewed products in the section below.
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1 Master Lock Magnum Heavy Duty Solid Steel Padlock with Key,Silver Master Lock Magnum Heavy Duty Solid Steel Padlock with Key,Silver No ratings yet
2 Master Lock Magnum Heavy Duty Outdoor Padlock with Key, 1 Pack Master Lock Magnum Heavy Duty Outdoor Padlock with Key, 1 Pack No ratings yet
3 BRINKS - 63.5mm Commercial Solid Steel Keyed Padlock - Solid Steel Body with Boron Steel Shackle BRINKS - 63.5mm Commercial Solid Steel Keyed Padlock - Solid Steel Body with Boron Steel Shackle No ratings yet
4 Master Lock M50XD Magnum Heavy Duty Stainless Steel Discus Padlock with Key, Silver Master Lock M50XD Magnum Heavy Duty Stainless Steel Discus Padlock with Key, Silver
5 Puroma Keyed Padlock, Stainless Steel Discus Lock Heavy Duty Locks with 3 Keys, Waterproof and... Puroma Keyed Padlock, Stainless Steel Discus Lock Heavy Duty Locks with 3 Keys, Waterproof and... No ratings yet
6 H&S High Security Padlock with Key - 60mm Pad Lock & 5 Keys - Heavy Duty Storage Unit Locker for... H&S High Security Padlock with Key - 60mm Pad Lock & 5 Keys - Heavy Duty Storage Unit Locker for...
7 94mm Padlock with Key, High Security 5 Keys Heavy Duty 1.1 KG D-Shaped Solid Brass Outdoor Keyed... 94mm Padlock with Key, High Security 5 Keys Heavy Duty 1.1 KG D-Shaped Solid Brass Outdoor Keyed...
8 Master Lock - (4) High Security Pro Series Keyed Alike Padlocks 6230NKA-4 w/ BumpStop Technology Master Lock - (4) High Security Pro Series Keyed Alike Padlocks 6230NKA-4 w/ BumpStop Technology
9 Master Lock Magnum Heavy Duty Stainless Steel Discus Padlock with Key, Keyed Alike, 2 pack Master Lock Magnum Heavy Duty Stainless Steel Discus Padlock with Key, Keyed Alike, 2 pack No ratings yet
10 Master Lock Combination Lock, Heavy Duty Weatherproof Padlock, Resettable For Outdoor Use, M175XDLF,... Master Lock Combination Lock, Heavy Duty Weatherproof Padlock, Resettable For Outdoor Use,...
11 Diyife® Heavy Duty Combination Padlock, Large Outdoor Padlock [One-Touch Unlocking] High Security... Diyife® Heavy Duty Combination Padlock, Large Outdoor Padlock [One-Touch Unlocking] High...
12 Master Lock - (4) High Security Pro Series Keyed Alike Padlocks 6230NKALH-4 w/BumpStop Technology Master Lock - (4) High Security Pro Series Keyed Alike Padlocks 6230NKALH-4 w/BumpStop Technology No ratings yet
13 BRINKS - 40mm Laminated Steel Weather Resistant Padlock with 2” Shackle - Vinyl Wrapped and Chrome... BRINKS - 40mm Laminated Steel Weather Resistant Padlock with 2” Shackle - Vinyl Wrapped and... No ratings yet
14 BRINKS - 3 7/8” Mini U-Bar Lock - Weather Resistant and Pick Resistant Bike Lock, Blue BRINKS - 3 7/8” Mini U-Bar Lock - Weather Resistant and Pick Resistant Bike Lock, Blue No ratings yet
15 BRINKS - 70mm Commercial Stainless Steel Keyed Discus Padlock - Stainless Steel Body with Stainless... BRINKS - 70mm Commercial Stainless Steel Keyed Discus Padlock - Stainless Steel Body with... No ratings yet
16 Master Lock 930DLHPF Padlock with Key, Hardened Steel Master Lock 930DLHPF Padlock with Key, Hardened Steel No ratings yet
17 Master Lock M5XTLJ Magnum Heavy Duty Outdoor Padlock with Key, 2 Pack Keyed-Alike,Silver Master Lock M5XTLJ Magnum Heavy Duty Outdoor Padlock with Key, 2 Pack Keyed-Alike,Silver No ratings yet
18 HOX Keyed Disc Padlock, Stainless Steel Keyed-Alike Padlocks, 4-Pack Heavy Duty Locks, Waterproof... HOX Keyed Disc Padlock, Stainless Steel Keyed-Alike Padlocks, 4-Pack Heavy Duty Locks, Waterproof... No ratings yet
19 Stainless Steel Keyed Padlock for Outdoor Use, 40mm Width Anti Rust Heavy Duty Padlock Weatherproof,... Stainless Steel Keyed Padlock for Outdoor Use, 40mm Width Anti Rust Heavy Duty Padlock... No ratings yet
20 BRINKS 173-80051 Stainless Steel Resettable Combination Discus Padlock, 80Mm, Silver BRINKS 173-80051 Stainless Steel Resettable Combination Discus Padlock, 80Mm, Silver

Bestseller No. 1
Master Lock Magnum Heavy Duty Solid Steel Padlock with Key,Silver
  • Indoor and outdoor padlock with key; maximum security lock with Tough-Cut octagonal boron-carbide shackle is best used as a gate lock, shed lock, and...
  • Lock is constructed with solid steel for increased strength and security; protective bumper for scratch resistance; keyway cover for weather...
  • Five-pin cylinder and dual ball bearing locking mechanism provides maximum pick and pry resistance; Tough-Cut octagonal boron-carbide shackle is 50%...
  • 2-1/2 in. (64 mm) wide lock body; 7/16 in. (11 mm) diameter shackle with 2 in. (51 mm) length, 15/16 in. (24 mm) width; extended shackle for...
  • Includes one padlock, two keys
Bestseller No. 2
Master Lock Magnum Heavy Duty Outdoor Padlock with Key, 1 Pack
  • Outdoor lock; Heavy duty padlock with key is best used for outdoor storage and fences, self-storage units and lockers, tools, job boxes and more.Note:...
  • Key lock features Dual Armor construction: laminated steel lock body with weather resistant cover and Tough-Cut octagonal boron-carbide shackle is 50%...
  • 4-Pin cylinder and dual ball bearing locking for increased pick and pry resistance; Covered keyway and shackle for added weather protection
  • 1-7/8 in. (48 mm) wide lock body; 5/16 in. (8 mm) diameter shackle with 1-1/2 in. (38 mm) length, 13/16 in. (21 mm) width; Extended shackle for...
  • Includes one padlock with two keys
Bestseller No. 3
BRINKS - 63.5mm Commercial Solid Steel Keyed Padlock - Solid Steel Body with Boron Steel Shackle
  • FEATURES: Brink’s Solid Steel Padlock has a 63.5mm steel body with a chrome plated Boron steel shackle for superior cut resistance.
  • SECURITY: Six-pin American keyway cylinder and dual steel ball bearing locking mechanism to reduce picking and prying.
  • STRENGTH: Steel shackle has a cut strength up to 17,000 lbs.
  • IDEAL USAGE: The padlock is ideal for storage containers, commercial and industrial high security, and other heavy-duty applications.
  • QUALITY YOU CAN TRUST: A global leader in security-related products and services, the Brink's name is synonymous with top quality products to keep you...
Bestseller No. 4
Master Lock M50XD Magnum Heavy Duty Stainless Steel Discus Padlock with Key, Silver
  • Indoor and outdoor padlock with key; maximum security padlock with Tough-Cut octagonal boron-carbide shackle is best used as a storage unit lock,...
  • Key lock is constructed with Tough-Cut octagonal boron-carbide shackle which is 50% harder than hardened steel; shrouded design minimizes shackle...
  • Four-pin cylinder for maximum pick resistance; reinforced body bumper for scratch resistance
  • 3-1/8 in. (79 mm) wide lock body; 7/16 in. (11 mm) shackle diameter with 5/8 in. (16 mm) shackle length, 1-7/32 in. (31 mm) width
  • Includes one padlock, two keys
Bestseller No. 5
Puroma Keyed Padlock, Stainless Steel Discus Lock Heavy Duty Locks with 3 Keys, Waterproof and...
  • High Security: The round disc structure minimizes shackle exposure; its 70mm body and the 3/8 inches diameter hardened steel shackle protect against...
  • Rubber Bumper Protection: The premium rubber cover of its lock body provides maximum scratch protection and it's detachable. Durable and resistant to...
  • Heavy Duty Lock: Made from high-quality 304 stainless steel, hardened steel, and brass, it can withstand physical attacks, corrosion, and weathering....
  • Easy to Use: The padlock comes with 3 keys, ensuring that you always have 2 spares to avoid problems with lost or broken keys. The discus lock is easy...
  • Wide Application: The versatile disc padlock can be used for storage units, garages & sheds, trailers, mobile trucks, outdoor gates, doors, logistics...
Bestseller No. 6
H&S High Security Padlock with Key - 60mm Pad Lock & 5 Keys - Heavy Duty Storage Unit Locker for...
  • Heavy-Duty Indoor & Outdoor Padlock: H&S Padlock boast heavy-duty features to surely protect your treasured items. Our storage locker lock can keep...
  • Classic Design with Closed Shackled Exposure: The outdoor padlock with key has a classical design with a closed shackled 60mm x 40mm body. It is made...
  • Durable & Reliable Construction: It has an inner mechanism for maximum corrosion protection that will make it last for years. With hardened boron...
  • Featuring Latest Technology Keys: It comes with 5 latest technology keys that can be kept in one place or separately, to share with others or to store...
  • Suitable for High Exposed Areas: We know how important it is for you to secure your items in a gym locker or protect merchandise but with this storage...
Bestseller No. 7
94mm Padlock with Key, High Security 5 Keys Heavy Duty 1.1 KG D-Shaped Solid Brass Outdoor Keyed...
  • HEAVY DUTY KEYED PADLOCK: Single lock weights up to 2LB. Brass body, Solid hardened steel shackle, both chrome plated. Unique D shape makes it perfect...
  • TOP SECURITY PADLOCK: Long shackle steel padlock, durable and secure you can trust. The high security padlock is heel toe locking with a freely...
  • WEATHERPROOF & HIGH ANTI-CORROSION: Lock body, Shackle & cylinder cover are in high resistance and waterproof even under strong acid. Both lock body...
  • KEY RETAINING – The Nestling Padlocks come with 5 stainless steel keys and are key retaining. The sturdy keys can only be removed from the padlock...
  • KEYED DIFFERENT – This lock ships keyed different, so each lock comes with a different key set. Do not worry that other person has the same lock and...
Bestseller No. 8
Master Lock - (4) High Security Pro Series Keyed Alike Padlocks 6230NKA-4 w/ BumpStop Technology
  • Four (4) High Security Locks Keyed Alike w/ 8 Keys. ProSeries Padlocks are designed for Commercial/Industrial applications. Limited Life Time...
  • Ideal for harsh outdoor conditions - exclusive Pro Series Weather Tough cover protects lock from water, ice, dirt and grime. Solid iron shackle shroud...
  • These locks feature the BumpStop Advanced Cylinder Technology. (for explanation see product details below).
  • Dimensions: 2-1/2 (64mm) wide round solid steel body, each weighing 1.48 lbs. A 7/16 (11mm) diameter hardened boron alloy shackle with 1-1/8 (29 mm)...
  • Chrome rustproofing provides longer life. These high security, rekeyable 5-pin cylinders with spool pins are virtually impossible to pick. And a dual...
Bestseller No. 9
Master Lock Magnum Heavy Duty Stainless Steel Discus Padlock with Key, Keyed Alike, 2 pack
  • WEATHERPROOF PADLOCK: Stainless steel lock body resists corrosion, with key opening cover that keeps locking mechanisms working smoothly
  • THEFT DETERRING PADLOCK: Padlock’s shrouded design, 4-pin cylinder and dual ball bearing locking send a clear message to would-be thieves and...
  • OCTAGONAL HARDENED SHACKLE: The shackle is the most critical defense against attacks, and the octagonal shaped shackle offers strong resistance to...
  • SAME KEY OPENS ALL LOCKS: Keyed alike padlock includes two keys that open all locks, for easy access across locked points
  • LOCK DIMENSIONS: 2-3/4 in. (70 mm) wide lock body; 3/8 in. (10 mm) diameter shackle with 5/8 in. (16 mm) length, 1-1/32 in. (28 mm) width
Bestseller No. 10
Master Lock Combination Lock, Heavy Duty Weatherproof Padlock, Resettable For Outdoor Use, M175XDLF,...
  • Heavy duty outdoor lock; Maximum security combination lock is best used as a gate lock, shed lock, or storage lock.Note: Measure your door's backset,...
  • Set your own four digit combination lock for easy combination recall; No combination change tool required, Shackle seal and hinged dial cover for...
  • Padlock is constructed with a zinc body and reinforced body bumper for strength and reliability; Shackle seal and covered dials for superior weather...
  • Tough-Cut octagonal boron-carbide shackle is 50% harder than hardened steel; Roller pin cylinder provides maximum pick and pry resistance
  • 2-1/4 inch (57 millimeter) wide lock body; 3/8 inch (10 millimeter) diameter shackle with 1-1/2 inch (38 millimeter) length, 15/16 inch (24...
Bestseller No. 11
Diyife® Heavy Duty Combination Padlock, Large Outdoor Padlock [One-Touch Unlocking] High Security...
  • 【 Heavy Duty Indoor & Outdoor Padlock】 Diyife large heavy-duty padlock adopts one-piece lock body, 304 stainless steel locking beam, 52mm wide...
  • 【One-Touch Unlocking Design】 The original password of the lock is 0-0-0-0. After the password is adjusted, press the middle button to open the...
  • 【Hidden Password & Anti-error Design】 The password is located at the bottom of the lock, which enhances the concealment. To change the password,...
  • 【Wide Range of Uses】 High quality stainless steel material makes padlock more secure, anti-theft, waterproof, snowproof, rustproof, suitable for...
  • 【Unique Appearance】 The square shell design is simple and elegant; The lock surface has anti-skid texture, which makes it feel very good. Only...
Bestseller No. 12
Master Lock - (4) High Security Pro Series Keyed Alike Padlocks 6230NKALH-4 w/BumpStop Technology
  • Four (4) High Security Locks Keyed Alike w/ 8 Keys. ProSeries hardened solid steel body padlocks are designed for Commercial/Industrial applications....
  • ATTENTION: If you order two 4-packs they will NOT necessarily be keyed the same. To ensure you get two 4-packs keyed alike, you must order the 8-pack.
  • APPLICATIONS: Industrial and manufacturing environments. it's a popular lock used by business owners to secure their storefronts and business gates....
  • DIMENSIONS: 2-1/2" (64mm) wide round solid steel body, each weighing 1.68 lbs. A 7/16" (11mm) diameter hardened boron alloy shackle with 2" (51 mm)...
  • CHROME rustproofing provides longer life. These high security, rekeyable 5-pin cylinders with spool pins are virtually impossible to pick. And a dual...
SaleBestseller No. 13
BRINKS - 40mm Laminated Steel Weather Resistant Padlock with 2” Shackle - Vinyl Wrapped and Chrome...
  • FEATURES - Brink’s Laminated Steel Padlock has a 40mm body with chrome plated, hardened steel shackle for cut resistance. The entire lock is vinyl...
  • SECURITY - Equipped with a four-pin brass tumbler cylinder, double lever locking mechanism for pick and pry resistance, and a key cylinder cover to...
  • STRENGTH - Steel shackle has a cut strength up to 4974 lbs.
  • IDEAL USAGE - With its superior corrosion resistance, it is perfect for use in any wet climate and the harshest environments. The padlock is ideal to...
Bestseller No. 14
BRINKS - 3 7/8” Mini U-Bar Lock - Weather Resistant and Pick Resistant Bike Lock, Blue
  • Lock body constructed from steel.Note: Measure your door's backset, cross bore and thickness to ensure you find the right fit.
  • Coated steel shackle and body to prevent scratching
  • 7-pin pick resistant tumbler cylinder
  • Cut resistant up to 5,000 lbs.
  • Lifetime warranty
Bestseller No. 15
BRINKS - 70mm Commercial Stainless Steel Keyed Discus Padlock - Stainless Steel Body with Stainless...
  • FEATURES: Brink’s Stainless Steel Discus Padlock has a 70mm body with stainless steel shackle for cut resistance. Round shielded design minimizes...
  • SECURITY: Equipped with a four-pin brass tumbler cylinder for pick and pry resistance.
  • STRENGTH: Steel shackle has a cut strength up to 8100 lbs.
  • IDEAL USAGE: The padlock is perfect for all types of storage lockers or sheds, truck work boxes, and construction site storage.
  • QUALITY YOU CAN TRUST: A global leader in security-related products and services, the Brink's name is synonymous with top quality products to keep you...
Bestseller No. 16
Master Lock 930DLHPF Padlock with Key, Hardened Steel
  • Indoor and outdoor padlock with key; Solid steel body security lock that is best used as a gate lock, shed lock, and storage lock.Note: Measure your...
  • Features hardened boron alloy shackle for maximum cut resistance
  • 5-pin removable cylinder for maximum pick resistance and ability to re-key your lock
  • 2-1/2 in. (64 mm) wide solid steel lock body; 7/16 in. (11 mm) diameter shackle with 2 in. (51 mm) length, 7/8 in. (22 mm) width
Bestseller No. 17
Master Lock M5XTLJ Magnum Heavy Duty Outdoor Padlock with Key, 2 Pack Keyed-Alike,Silver
  • Outdoor lock; Heavy duty padlock with key is best used for outdoor storage and fences, self-storage units and lockers, tools, job boxes and more.Note:...
  • Key lock features Dual Armor construction: laminated steel lock body surrounded by stainless steel and zinc outer components and Tough-Cut octagonal...
  • 4-Pin cylinder and dual ball bearing locking for increased pick and pry resistance; Reinforced body bumper for increased scratch resistance
  • 2 in. (51 mm) wide lock body; 3/8 in. (10 mm) diameter shackle with 2-1/2 in. (64 mm) length, 15/16 in. (24 mm) width; Extended shackle for...
  • Includes two padlocks with two keys; Both keys open all locks
Bestseller No. 18
HOX Keyed Disc Padlock, Stainless Steel Keyed-Alike Padlocks, 4-Pack Heavy Duty Locks, Waterproof...
  • Robust Security: The HOX Keyed Disc Padlock is crafted from stainless steel, providing exceptional security to safeguard your property and valuables.
  • High Waterproof and Corrosion Resistance: This lock offers waterproof and corrosion-resistant features, making it suitable for both indoor and outdoor...
  • Keyed-Alike Design: This set of 4 locks features a keyed-alike design, making it convenient to manage multiple locks without the need for different...
  • Large-Sized Lock Body: With a 2-3/4-inch wide body and a 3/8-inch shackle, it is versatile and can be used for various purposes such as hasp latches,...
  • Smooth Key Operation: The keys for these padlocks are designed for smooth and reliable operation, ensuring easy and quick access to your secured...
Bestseller No. 19
Stainless Steel Keyed Padlock for Outdoor Use, 40mm Width Anti Rust Heavy Duty Padlock Weatherproof,...
  • Anti Rust For All Time: One-piece stainless steel padlock body design, anti-rust, anti-saw, Security padlock for indoor and outdoor rain/snow use.
  • Heavy Duty Padlock: 40mm width, The key padlock can anti-drop, super anti-cut, anti-saw, anti-drill, super strong anti-pry & anti-thief cylinder.
  • High Security: Door padlock super strong anti-pry & anti-thief, anti-pry double-ball Locking, 9-disc cylinder for maximum pick resistance,1.4mm key...
  • Easy to Use: Insert the key and rotate 180 degrees clockwise to unlock, the key is on the padlock body . the key can be removed when locked. When the...
  • Package Include: One padlock with three keys, Ideal gift for your friends, family, parents, classmates, etc.
SaleBestseller No. 20
BRINKS 173-80051 Stainless Steel Resettable Combination Discus Padlock, 80Mm, Silver
  • FEATURES: Brink’s Stainless Steel 4-Dial Resettable Padlock has an 80mm body with chrome plated, hardened steel shackle for cut resistance; The...
  • SECURITY: The discus padlock is equipped with a 4-pin tumbler, a single steel bar locking mechanism for pick resistance and a 4-dial combination; The...
  • STRENGTH: Steel shackle has a cut strength up to 5300 lbs.
  • IDEAL USAGE: The padlock is ideal for securing various storage lockers, sheds, tool boxes, and doors.
  • QUALITY YOU CAN TRUST: A global leader in security-related products and services, the Brink's name is synonymous with top quality products to keep you...

What should you look for when purchasing the best heavy duty padlock?

To purchase the right product, you need to research its qualities and flaws.

Diversity is highly important since it offers options for different budgets and lifestyles. Choosing the best heavy duty padlock requires asking yourself the right questions to ensure the product is precisely what you need.

To make your money’s worth, you should thoroughly research the options you are presented with and ask the following questions:

  • How does buying heavy duty padlock benefit me?
  • Is it worth the price?
  • Which heavy duty padlock is the best option to go for in the nowadays market?
  • What features are essential when purchasing the heavy duty padlock?
  • Which brand of the this is most trustworthy?
  • Which heavy duty padlock has the best price/value ratio?

You are bound to have even more vitally important questions when purchasing the heavy duty padlock. The best way to inform yourself about it is a meticulous exploration of internet resources and research for second opinions and customer reviews.

Various websites can hold pieces of information necessary for purchasing a top-notch product. Forums, reviews, and rating websites can all offer you the instrumental info needed to buy the best possible heavy duty padlock. In order to get accurate information, you should explore trustworthy websites that have a history of providing customers with specific and genuine content.

Curee.org worked hard and conducted comprehensive research to get you the necessary information regarding the heavy duty padlock.

It helps us to put together a high-quality buying guide that will provide you with pros and cons, features, and reasons the product is the right choice for you. To get the heavy duty padlock that will suit your needs best, you should consider the following factors:

Advantages of the Brand

Every brand of heavy duty padlock holds different values to it. Typically, each and every brand will have something unique that will attract your attention and make you consider their product as the leading option. The more unique the feature is, the more it will allure you to the product and its value.

Features

Each product has some value that separates it from the pack. Therefore, always ask yourself what features are relevant when purchasing the heavy duty padlock? What is essential for this product to have?

Value of the product

This factor is crucial since it can tell you how much value you will get for your money’s worth when purchasing this.

Customer reviews

The second opinion always matters when you cannot decide on which product you should opt for. These reviews will paint you the picture of the heavy duty padlock by real-world customers that had experience with the product and inform you on how well it served them.

Customer ratings


Customer ratings are similar to reviews but offer you a number or star rating of the heavy duty padlock, which can tip the scales when you are unsure which product to choose.

Reliability

To get the heavy duty padlock that will serve your purposes and pay off, you need to choose a reliable and durable one. High-quality product equals wise investment and peace of mind.

Beware off-brands

Purchasing the off-brand heavy duty padlock is unwise. Always look for reliable brands that offer you the highest possible quality and are trusted and recognized as a legitimate option.

Curee.org always tends to bring its visitors accurate and valuable information that is relevant to the heavy duty padlock. We always refresh and update our content since our priority is and has always been top-notch user experience.

If you have any questions or suggestions about our presentation of the this product, please let us know. You can contact us here, and if our article has made you interested in our work, you can find more about us and better realize our vision and what it represents.

FAQ:

Q: What is the strongest pad lock available?

A: These are the best padlocks we tested ranked, in order: Stanley Shrouded Hardened Steel Padlock Desired Tools 4 Digit Combination Lock ABUS Titalium Aluminum Alloy Padlock Kwikset SmartKey Master Lock Bluetooth Padlock Master Lock Word Combination Lock Master Lock Set Your Own Combination Padlock ABUS Diskus Padlock Master Lock Standard Dial Combination Lock ORIA 4 Digit Combination Lock

Q: What kind of padlock is most secure?

A: What Type of Padlock is Most Secure (Locked Tight) Union Hercules Padlock. Union Hercules gets the top spot on our list for a very good reason. … Ingersoll 10 Lever Padlock. This lock is one of the longest on the market since they were initially released in 1971. … Vulcan Viro Premium. … ABUS 20/70 Diskus. … Squire Locks SHCB65 Stronghold. …

Q: Who makes the best padlock?

A: Top pick: Master 4401DLH Bluetooth Smart Padlock. The Master Bluetooth Smart Padlock is our top pick as it fuses the most current app technology while retaining the heft of a reliable, tough piece of hardware resistant to cutting or picking. Simply download the Master Lock Vault eLocks app from your app store…

Q: What are the parts of a pad lock?

A: A padlock is composed of a body, shackle, and locking mechanism. The typical shackle is a “U” shaped loop of metal (round or square in cross-section) that encompasses what is being secured by the padlock (e.g., chain link or hasp).