The 3 Best Locks for Storage Units

Move.org looked at hundreds of options to find the three best storage unit locks on the market.
Best overall
An ABUS disc lock
ABUS 20
4.5 out of 5 stars
4.5
$49.97
  • Disc lock
Strong
A Medeco padlock
Medeco 3
4.2 out of 5 stars
4.2
$124.40
  • Padlock
Cheap
Kurt Manwaring
Researcher & Writer
Read More
Published on April 13, 2021
6 min read

Our top pick: We recommend the ABUS 20 padlock. It comes in multiple sizes, has remarkably high quality for the $49.97 price tag, and is an industry favorite.


The 3 best storage unit locks


Compare storage unit locks

Lock
Price
Strong shrouded shackle*
Multiple sizes
Details
ABUS20
$49.97
Icon Yes  DarkYes
Icon Yes  DarkYes
Medeco M3
$124.40
Icon Yes  DarkYes
Icon No  DarkNo
Stanley Hardware Shrouded Padlock
$37.63
Icon No  DarkNo
Icon No  DarkNo

Amazon.com Price; ABUS 20: $49.97; Medeco M3: $124.40; Stanley Hardware: $37.63 (as of 2/22/21 9:49 MST). See full disclaimer. Data as of 2/22/21. Offers and availability may vary by location and are subject to change.

*Shrouded shackle means that the lock’s body covers part of the U-shaped bar at the top of the lock.


What should you look for in a storage unit lock?

  • Lock strength. The stronger your lock, the safer your stuff. You also want a weather-resistant lock if your storage unit is outdoors.
  • Price. Find a lock that costs more than a thief’s bolt cutters, but that won’t set you back a ton. We recommend a range of about $40–$200.
  • Popularity. Locks that repeatedly show up on industry Top 5 lists are a sign of high quality. (Don’t be deceived by Amazon reviews where customers often reward low-priced, low-quality locks.)
  • Shrouded shackle. This is fancy language that means the U shape at the top of your lock is partly covered (or “shrouded”) by the lock itself. Some shrouded locks are higher quality than others—and cost more as a result.
  • Size options. Lock size requirements vary by the self-storage facility. If you choose a lock with multiple sizes, it’s more likely to fit on your storage unit.
  • Lock type. There are three types of storage unit locks. You can use padlocks and disc locks at most storage units (it’s tougher to find units that allow cylinder locks).
Info Box
What is a disc lock?

A disc lock is similar to a standard padlock but is circle-shaped (rather than rectangular).


ABUS 20 Disc Lock—Best overall

Best overall
An ABUS disc lock
ABUS 20 Disc Lock
Our Rating
4.5 out of 5 stars
4.5

The ABUS 20 disc lock brings a one-two punch with its high quality and affordable $49.97 price tag. It has an anti-cut plate (thieves can’t quickly slash through it), is resistant to lock-picking and drilling, and comes from one of the business’s best manufacturers. The ABUS lock also comes in multiple sizes, which means there’s a better chance one of those variants will fit on your storage unit door. The main drawback is that the keys sometimes jam when it’s cold outside. Overall, we haven’t found better quality for the price.

Pro Heading
PROS
Pro Bullet Affordable
Pro Bullet Anti-cut plate
Pro Bullet Multiple sizes
Pro Bullet Award-winning manufacturer
Con Heading
CONS
Con Bullet Doesn’t work well outdoors

Amazon.com Price; $49.97 (as of 2/22/21 9:49 MST). See full disclaimer. Data as of 2/22/21. Offers and availability may vary by location and are subject to change.

What sets ABUS 20 apart?

The ABUS 20 disc lock is affordable

The ABUS 20 disc lock costs only $49.97. That’s a deal considering high-quality storage unit locks can easily cost two, three, or even four times as much. The ABUS lock is also more expensive than off-the-shelf bolt cutters—meaning your stuff won’t be easy pickings for amateur thieves.

The ABUS 20 disc lock comes in multiple sizes

The ABUS 20 disc lock comes in a variety of sizes. This is a huge win for the ABUS lock because each storage unit company has slightly different size requirements. The ABUS 20 is more likely than other locks to fit your storage unit door no matter where you go.

ABUS 20 disc lock size ranges
Description
Min.
Max.
Shackle diameter10 mm.3/8 in.
Horizontal clearance20 mm.25/32 in.
Vertical clearance17 mm.21/32 in.
Body width70 mm.2-3/4 in.
Weight340 g.12 oz.

Data as of 2/18/21. Offers and availability may vary by location and are subject to change.

The ABUS 20 disc lock is strong

The ABUS 20 disc lock has remarkable strength for its $49.97 price tag. The circular shape makes it tough for thieves to get into, and nobody makes better disc locks than ABUS (the company invented them). The ABUS 20 model comes with an anti-cut plate and is also resistant to drilling and picking. You just don’t find stronger locks in this price range.

Looking for high quality and low costs?


Medeco 3 Padlock—Strong

Strong
A Medeco padlock
Medeco 3 Padlock
Our Rating
4.2 out of 5 stars
4.2

The Medeco 3 padlock is the strongest lock on our list. Its hardened steel cylinder makes it resistant to cutting, drilling, and picking. The shrouded shackle is top-notch. It’s also the only lock on our list that works equally well with indoor and outdoor storage units. Even the keys are impressive (lower-quality locks have keys that easily jam). But you’ll also pay more for the extra security—the Medeco 3 padlock clocks in at a pricey $124.40.

Pro Heading
PROS
Pro Bullet Weather-resistant
Pro Bullet High-quality keys
Pro Bullet Hardened-steel cylinder
Pro Bullet Strong shrouded shackle
Con Heading
CONS
Con Bullet Expensive

Amazon.com Price; $124.40 (as of 2/22/21 9:49 MST). See full disclaimer. Data as of 2/22/21. Offers and availability may vary by location and are subject to change.

What sets Medeco 3 apart?

The Medeco 3 padlock works outdoors

The Medeco 3 shrouded shackle padlock uses boron alloy steel materials that protect against bad weather. It’s the only lock on our list that works well for indoor and outdoor storage units.

The Medeco 3 padlock is a nightmare for thieves

The Medeco 3 padlock is a customer favorite, but looters don’t like it. The lock’s cylinder uses hardened steel that protects against cutting, picking, and drilling. Any lock is breakable, but it’s tougher for crooks to get through this lock than any other option on our list.

The Medeco 3 padlock gets stellar reviews

Customers give the Medeco 3 padlock incredibly high reviews. You literally can’t find a review that’s lower than four stars. But there’s a catch: the Medeco 3 lock isn’t cheap. You can expect to pay about $124.40 for the extra quality.

Want top-notch security?

Megaphone
What about rental truck locks?

Use a standard padlock. Shrouded padlocks provide extra protection for storage units but aren’t usually compatible with rental truck companies like U-Haul and Penske.


Stanley Hardware Padlock—Cheap

Cheap
Stanley Hardware Padlock
Our Rating
3.3 out of 5 stars
3.3

The Stanley Hardware padlock doesn’t have the best quality, but it’s tough to find a better lock if you’re short on cash. The lock offers resistance to drilling and lock picking, and the padlock design increases the odds it will fit your storage unit door. On the downside, the keys are sticky, the lock doesn’t hold up well in bad weather, and the shrouding pales in comparison to high-quality locks. But if price is king, this is your royal baby.

Pro Heading
PROS
Pro Bullet Low cost
Pro Bullet Good for the price
Pro Bullet Drilling-resistant
Con Heading
CONS
Con Bullet Sticky keys
Con Bullet Minimal shrouding
Con Bullet Doesn’t work well outdoors

Amazon.com Price; $37.63 (as of 2/22/21 9:49 MST). See full disclaimer. Data as of 2/22/21. Offers and availability may vary by location and are subject to change.

What sets Stanley Hardware apart?

The Stanley Hardware padlock is cheap

The Stanley Hardware padlock costs only $37.63. That’s a good thing if you don’t have enough for a better lock. But the lock also makes you a bigger target for thieves—and that’s a bad thing.

The Stanley Hardware has good quality for the price

The Stanley Hardware padlock may not have all the bells and whistles of high-quality locks, but you also can’t find a stronger option in the $30 price range. That’s why we recommend the lock even though it scores lower than more expensive competitors.

Need a cheap storage unit lock?


The best locks for storage units FAQ

Which company makes the best disc padlock?

ABUS makes the best disc padlock. Move.org recommends the ABUS 20 disc-shaped padlock as the top overall lock for storage units.

What company makes the Diskus padlock?

ABUS makes the Diskus padlock. The lock comes in several sizes and costs about $49.97.

What is a closed shackle padlock?

A closed-shackle padlock (also called a shrouded-shackle padlock) is a lock where the U-shaped bar is partially covered—or shrouded—by the lock’s body.

Can I put a traditional padlock on my storage locker?

You can put a traditional padlock on your storage locker if it meets the self-storage company’s size requirements. However, Move.org recommends you purchase a stronger lock with a thick shackle and added security design measures.

What is the best lock for an outdoor storage unit?

The best lock for an outdoor storage unit is the Medeco 3 shrouded-shackle padlock. The lock’s boron alloy steel materials prevent it from becoming brittle in bad weather.

What size of lock do I need for my self-storage unit?

The size of lock you need for your self-storage unit depends on the storage facility’s requirements. Check online or ask the company’s on-site manager for more information.

What is the best padlock for a storage facility?

The best padlock for a storage facility is the ASUS 20 disc lock. It uses hardened steel, has a shrouded shackle, and comes in multiple sizes. The lock costs approximately $50.


Recap

The best lock for storage unit doors is the ASUS 20 disc padlock. The lock appears on more Top 5 lists than any other option for good reasons: it comes in multiple sizes, is resistant to cutting, drilling, and picking, and costs only $49.97. You can find better-quality locks, but they cost upwards of $100–$200.

Want to use Move.org’s highest-rated storage unit lock?

Disclaimer

Certain content that appears on this site comes from Amazon. This content is provided 'as is' and is subject to change or removal at any time.

Kurt Manwaring
Written by
Kurt Manwaring
Kurt Manwaring brings nearly a decade’s worth of research experience as a business consultant to the Move.org team. He specializes in taking complicated issues (like moving) and presenting them in a way that everyone can understand. His writing has been featured in hundreds of publications, including USA Today, Country Living, Good Housekeeping, Heavy, Slate, and Yahoo! Lifestyle. He would love to hear about your moving experiences and questions at kurt@move.org.