Image: MomJunction Design Team
If keeping your valuables in a safe spot is a concern, you can check out our list of the best locks for storage units to secure them. These locks are smartly designed for use at home and outdoors. The weatherproof lock mechanism of these options prevents corrosion under extreme climatic conditions, and the padlocks help you set passwords and change them at your convenience. If you’re looking for a lock for your self-storage units to keep your valuable possessions safe, explore our list of reliable products to choose the right one for yourself.
Top Picks
Types Of Locks For Storage Units
Locks for storage units can be grouped under six types.
- Key access disc locks: Compared with other locks, these locks are more resistant to breaches from strikes, drills, and lock picking. The small U-shaped shackle makes it difficult for unwanted intruders to gain access.
- Key access padlocks: Padlocks have chambers that connect to a circular or rectangular locking mechanism. You need to insert the key into the chamber and turn it clockwise to release the lock. These are affordable and quick to unlock.
- Combination and dial locks: This lock type does not require a key. You only need to enter the number combination through a dial or press a code on the pad to unlock the device.
- Key or dial chain locks: This lock type consists of a long chain and a locking mechanism that you can open with a key or dial combination. They are effective in protecting your bike but not efficient for self-storage units.
- Cylinder locks: These are locks that you usually use on your doors.
- Bluetooth locks: These are smart locks that can be remotely controlled via smartphones or other compatible devices. You can monitor Bluetooth-enabled digital locks for storage units anytime and anywhere via an associated app.
11 Best Locks For Storage Units
1. Best Easy To Carry:Puroma Combination Lock
Image: Puroma 
Why We Think It's Worth Buying
The 14,511 positive customer reviews on Amazon attest to the product’s quality.
Puroma is a four-digit lock that offers 10,000 combinations. The shackle has a diameter of 0.25in, and the lock is suitable for gymnasiums, schools, toolboxes, etc. A numeric combination makes it easy to reset your preferred number and avoid the hassle of carrying keys. When setting the combination, the side window allows you to view it easily. This trusted mini-sized black lock is made of zinc and alloy bestowing it immense strength and it comes in a pack of two. Watch this video of the combination lock for a storage facility for more information.
Pros
- Compact design
- Lightweight
- Easy to carry
- Easily readable
Cons
- Small tooth engagement
"Durable, secure, and adaptable to different settings, this lock is everything I could ask for. Setting the personal combination is also a breeze�I could do it even without my glasses."
2. Best Flexible:Master Lock Padlock
Image: Master Lock Why We Think It's Worth Buying
More than 7,846 independent reviewers on Amazon have acknowledged the product's durability and functionality.
Master Lock is one of the best outdoor and indoor padlocks and is most suitable for storage units, sheds, or gate locks. It uses a black vinyl-covered aluminum body to make it corrosion- and scratch-resistant. For more convenience, it offers a standard padlock for storage units with two matching color keys. The diameter of the shackle is 0.25in, making it compatible with most locking holes. The four-pin cylinder prevents prying, and the dual locking levers prevent hammering. Go through this video review for a detailed understanding of this high-security lock for a storage facility.
Pros
- Lightweight
- Durable
- Flexible
- Compact design
- Four-pin cylinder
Cons
- May be hard to open at times
"Impressed by its user-friendly build, I use this nifty thing to lock everything from gym lockers to storage units. Its long shackle has also made it a breeze to attach to different door handles. While there have been slight bending issues, it has still proven to be a reliable find."
3. Best With All-Round Protection:Abus Diskus 20/70 Padlock
Image: Abus Featuring a heavy-duty stainless steel construction both internally and externally, this tried-and-tested Diskus padlock by Abus is burgle-proof. It features a disk cylinder to resist drilling and key manipulation. In addition, the cylinder also keeps the keyhole dust- and splash-resistant. Designed with a welded seam, the padlock is built with immense strength to resist break-opening attempts. Additionally, the anti-cut plate enhances safety and saw attack protection.
Pros
- Provides all-round protection
- Corrosion-resistant
- Includes a spare key
- Designed with key codes
- Narrow temple opening
- Heavy-duty lock for storage units
- Closed shackle padlock
Cons
- Shackle may not be compatible with the thick latch
- Key’s base may be bulky
"Despite featuring a sophisticated mechanism, this lock operates smoothly. It has also not rusted even though it was installed on the outer door. Also, the cover on its hole has kept it from accumulating dust and getting picked."
Did you know?Puroma Combination Lock Best Easy To Carry | Master Lock Padlock Best Flexible | Abus Diskus 20/70 Padlock Best With All-Round Protection | |
|---|---|---|---|
| Material | Steel, Zinc | Aluminum, Alloy Steel | Aluminum,Brass,Stainless,Stainless Steel,Steel |
| Dimensions | 3.15 x 1.73 x 0.8 inches | 5.6 x 3.5 x 0.8 inches | 2.75 x 2.75 x 2.5 inches |
| Weight | 8.8 ounces | 3.2 ounces | 5.6 ounces |
| Shape | Rectangular | Rectangular | Round |
| Color | Black | Black | Silver |
| Rating | |||
| Reviews | 14,511 | 7,846 | 591 |
| Price | $11.99 | $8.99 | $41.99 |
4. Best Weatherproof:Brinks Padlock
Image: Brinks Why We Think It's Worth Buying
Join the 1,346 satisfied buyers on Amazon who have said the product meets their needs and expectations.
Brinks lock is a high-security padlock featuring stainless steel construction, ideal for securing lockers, sheds, and toolboxes. The circular design minimizes shackle exposure and protects against cutting, while the four-dial combination provides you with higher security. The ergonomic single steel bar locking mechanism makes it pick- and saw attack-resistant, securing your storage facility with efficiency.
Pros
- Durable
- Sturdy
- Weatherproof
- Easy-to-carry
Cons
- Numbers may be stiff to rotate
"This combination lock has removed the hassle of carrying keys altogether. That said, its dial was a little stiff in the beginning. However, its straightforward combination setup and solid build have made it my preferred tool for locking valuables."
5. Best Pick-Resistant:Schlage Padlock
Image: Schlage Schlage high-security lock has a six-pin brass cylinder with a polished finish. It is a universal latch, compatible with most locking holes. The diameter of the molybdenum steel shackle is 2.5in, which provides heightened security to any traditional storage facility. The round-shaped hardened solid steel cylinder lock for self-storage units comes in a pack of two, including four identical keys.
Pros
- Sturdy
- Durable
- Pick-resistant
- Thick shackles
- Lifetime warranty
Cons
- Delicate keys
"Securing my units with this lock brings much peace of mind as it's durable and secure. Its keys occasionally require a touch of oil, but that�s a minor hassle compared to their versatility and weather-proof build."
6. Best Versatile:Puroma Keyed Padlock
Image: Puroma Suitable for garages, toolboxes, sheds, and gates, this versatile padlock by Puroma features a chrome-plated shackle, protecting against bolt cutters. The professional-grade padlock kit includes three keys, and these keys can’t open other padlocks by Puroma. In addition, the stainless steel body construction and the brass cylinder design offer added safety to the keyed lock for storage units. Moreover, the rounded-shielded design minimizes shackle exposure, enhancing the security quotient of your safety facility.
Pros
- Weather-proof
- Compact and lightweight
- Round-shielded design
- Corrosion-resistant
Cons
- May not be compatible with school lockers
- May not include a keyhole protection cover
"This disc-style lock has been perfect for my day-to-day security needs. It even withstood a tampering attempt made using bolt cutters, which I was very impressed with. Some could find it heavy, but it has withstood various forces, including harsh weather."
7. Best Anti-Corrosion:Sanxi Disc Padlock
Sanxi stainless steel disc padlock, weighing 250g, is ideal for gates, storage units, lockers, etc. The shackle of this storage lock, measuring 0.95in in diameter, is made of hardened steel for higher security and is compatible with most latches. According to reviewers, the minimal exposure of the shackle makes it anti-pry. The four-digit dial comes with the security feature of setting a password in 10,000 combinations.
Pros
- Anti-saw attack design
- Sturdy
- Anti-rust
- User-friendly
- Anti-corrosion
- Heavy duty shrouded design lock for storage units
Cons
- Difficult to put through chains
"The occasional maintenance need aside, this lock has been a dependable find for securing my lockers. Besides, its short shackle is a boon as it keeps people from pulling on it, and the four numerical dials offer enhanced security."
8. Best Rustproof:Tuff4ever padlock
Tuff4ever is a heavy-duty padlock built to withstand maximum weather resistance. The 304 stainless steel provides a superior cut and makes it pry-resistant. The shackle’s circular shield design is 0.25in in diameter, reducing the risk of shackle exposure. The solid brass tumbler of this high-quality storage unit lock has a five-pin cylinder, and the black rubber bumper protects the body from scratches. It is constructed with high-quality inner components and comes with three keys.
Pros
- Waterproof
- Anti-corrosion
- Long-lasting
- Rust-proof
- Sturdy shrouded design
- Weather-resistant lock for storage units
Cons
- Maybe stiff to lock
"I'm pleased with this lock's smooth mechanism. Its durable build and ease of use are reassuring too. I've ordered one more for my garage."
9. Best Easy-To-Operate:FJM Security Padlock
Image: Image: Fjm If you are looking for a perfect keyless solution, FJM Security padlock is the trusted choice. The four-dial combination disc padlock is suitable for security gates, bikes, storage units, etc. The unique shape and design of this secure lock protect it from theft, bolt cutters, and intrusive tools. With more than 10,000 password combinations, the padlock offers maximum security. The storage lock’s exterior is made of 304 stainless steel material, making this disc lock for storage units suitable for heavy-duty outdoor applications.
Pros
- Easy-to-operate standard padlock
- Anti-rust
- Anti-pry security feature
- Sturdy
- Shrouded design
- Long-lasting
- Doubles as a bike lock
Cons
- Numbers may be hard to turn
"Having used this lock for a few months, I can vouch that it withstands drops and cutting very well. Its build also feels sturdy, and the combination mechanism makes it convenient. Surprisingly, it didn't come with instructions, but setting it up was still straightforward."
Did you know?10. Best Waterproof:Jin Jin Combination Padlock
Jin Jin lock is a five-position combination padlock with a long handle, ideal for door handles, file cabinets, gym lockers, etc. The time-tested high-security padlock offers 100,000 password combinations for higher security. The secure lock features a cast metal body made of zinc alloy material, making it durable. The 2.75in long handle makes it ideal for most latches. The lightweight lock is small and portable.
Pros
- Easy-to-use
- Anti-rust
- Waterproof
- Long shackle lock for storage units
Cons
- The combinations may not hold up well
11. Best Bump-Resistant:Commando Heavy Duty Padlock
Commando provides this military-grade padlock manufactured to suit aerospace tolerance for high security. A highly secured cylinder with ten security pins prevents theft and breakage, while the riveting interlocking structure and re-curved design protect the storage lock from hammer blows. The high-quality steel-alloy shackle is ideal for doors, storage containers, cabinets, and gun cases. It comes in a pack of two with four keys.
Pros
- Has the strength of dual-hardened steel
- Weatherproof
- Sturdy
- Anti-saw security feature
- Long-lasting
- Bump-resistant
Cons
- Coating may not be durable
"I have bought multiple of these for different needs over the years and continue to be impressed with their sturdy build. Its metal does make it a bit hefty, but that additional weight has only helped it become more pick-resistant."
How To Choose The Right Lock For Storage Unit
Before purchasing a tried-and-tested lock for your storage unit, consider the following points.
- Security: If you are buying it for a unit that already has some other locking provisions, you can choose a lock made of light material. However, if you are buying for a high level of security, you should choose a sturdy lock.
- Shackle size: This is an essential factor to consider because if your latch is big and the shackle’s diameter is small, you will not be able to use it. Besides, too much shackle exposure makes it vulnerable to theft.
- Size: Determine the lock size according to your application area’s size and bolt size. Avoid buying a large padlock if you want to use it for a small storage unit.
- Design: Conventional padlocks are more comfortable to cut than disc padlocks. Disc padlocks are safer because the shackles do not provide enough space for bolt cutters.
- Durability: If you are buying a lock for outdoor storage units, ensure the lock is weatherproof to ensure exceptional durability. Too much weather exposure may cause it to rust.
Frequently Asked Questions
1. Do I need to buy a lock for my storage unit?
If your self-storage unit doesn’t have an in-built lock or the existing one isn’t sturdy enough, investing in a high-quality lock is a good idea.
2. What kind of lock do I need for a storage unit?
Disc locks are ideal as their design makes them cut proof. Locks with a combination padlock add to the security quotient. They should be made of corrosion-resistant material, such as vinyl coating, and the lock’s shackle size should be proportional to the storage unit’s latch.
3. How do I secure a storage locker?
Depending on the design of the storage locker latch, you could secure it with a disc lock, keyless combination lock, or heavy-duty padlock.
4. How do I open a storage unit when the keys are lost?
You’ll have to go through the tedious and time-consuming process of cutting or breaking the lock. If you are prone to losing keys quite often, a keyless entry lock for storage units or a combination lock will serve you better.
5. Is it safe to store things in a storage unit?
As long as the storage unit is secured with a high-quality, sturdy lock that cannot be easily damaged, it could be safe to store things in a high-grade storage unit.
6. How long do storage unit locks last?
Storage unit locks can last for years at a stretch if maintained well and made by reputable manufacturers using durable and corrosion-resistant materials.
Why Trust MomJunction?
Your storage units may consist of important documents, ornaments, and other things that need to be kept safe. A cutting-edge locking system would help keep your possessions safe and secure. To purchase an appropriate lock for your requirement, consider the level of security you expect and choose the size and design accordingly. From Bluetooth to combination locks, our list of the best locks for self-storage units includes various durable, easy-to-operate, and long-lasting options for optimal security.
The Bottom Line
Sturdy locks are essential for keeping your valuable items safe. The best locks for storage units come in various designs and sizes and serve many purposes. When storing your personal belongings, you will need the best locks to secure them. Our top pick is the Puroma Combination Lock with a numeric locking system that eliminates the need to carry keys. You may also consider the Brinks Padlock for its weather-proof feature or the Schlage Padlock for its tamper-proof high level of protection. Additionally, you can consider the other options on this list to protect your valuables.
Infographic: What Are The Different Kinds Of Locks For Storage Units?
Selecting the right lock for your storage unit involves understanding the various types available and their unique features and characteristics. Check out the following infographic for an overview of these options. It could help you find a lock that best suits your needs and circumstances.
Illustration: Momjunction Design Team
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