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If you have a storage unit, you probably realize that storage centers are a bit sketchy. In other words, they don’t always have the best security measures, and storage units are often burglarized. Therefore, you probably want the best padlock. 

According to the popular show Storage Wars, you could have millions of dollars’ worth of goods in your storage unit. Fear not, because right now we will help you find the best padlocks for storage units that your money can buy. 

CCL Security Products Sesamee K436 Padlock

This is a secure lock that can be used for storage units and other purposes where you need to ensure the safety of your belongings. For one, this is a 4 digit combination lock, one where you can set the combination yourself. Seeing as there are 4 digits, there are well over 10,000 combinations to choose from, and setting the combination is very easy. 

The lock itself features a 2-inch wide solid brass case, with a hardened steel and chrome-plated shackle. 

All internal locking mechanisms are also made of brass; therefore, the CCL Security Products Sesamee K436 Padlock is very strong, it is highly resistant to impact, and resistant to tampering as well. Thanks to the materials, it’s also highly resistant to weather, which is important for outdoor storage units. 


  • Many combinations to choose from
  • Easy to set combo
  • Very strong lock – very durable and resistant
  • Weather-resistant


A thief could potentially figure out the combo

ABUS 20/70 Diskus Stainless Steel Padlock

If you need a very strong and durable padlock to ensure that your storage unit remains secure, the ABUS 20/70 Diskus Stainless Steel Padlock is a great choice. It is made out of heavy-duty stainless steel, and this includes both the body and the shackle. 

The steel is very thick, which makes it strong and durable. Moreover, due to the rounded shape of this lock, the shackle has minimum exposure, and this makes it very difficult for thieves to get leverage on it or to tamper with. 

When it comes down to it, this might be one of the toughest and most thief-proof locks available. Since it is made of stainless steel, it is also resistant to harsh weather conditions. 


  • Extremely durable
  • Weather-resistant
  • Hard to tamper with
  • Good price


The keys are small and weak

FJM Security Products Triple Chrome Plated Padlock

When it comes to durable locks that can keep thieves at bay, the FJM Security Products Triple Chrome Plated Padlock is one of the top contenders. This lock is made of stainless steel and is triple chrome plated; all of the interior mechanisms are made of solid materials. 

This is one of the toughest keyed padlocks for any storage unit. It can easily resist many forms of tampering. Since it is made of chrome and stainless steel, it is also resistant to moisture and extreme weather, which means that it should not rust. 

The FJM Security Products Triple Chrome Plated Padlock has a large amount of shackle clearance, which makes it ideal for large storage units. The heel/toe shackle is free-rotating, so it also resists cutting. 


  • Weather-resistant
  • Cut- and impact-resistant
  • Tamper-resistant
  • Easy to use
  • Durable and heavy-duty 


Pick resistance is limited

Stanley Hardware S828-160 CD8820 Padlock

If you are on the hunt for a lock that can resist all sorts of attacks, the Stanley Hardware S828-160 CD8820 Padlock is another great product. This lock features many security aspects; for one, it comes with a fully shrouded stainless steel body. 

Second, it features a commercial 6 PIN cylinder design. Next, it has dual stainless steel ball bearings. This comes together to give this lock an ASTM security grade 5 rating, which is very high. Thanks to the heavy-duty nature of this lock, it is super resistant to picking, prying, drilling, cutting, and hammering. 

It’s one of the securest locks on the market. Moreover, due to its stainless steel make, it is also resistant to inclement weather. It may not look fancy and it may not be super expensive, but it can get the job done. 


  • Extremely durable
  • Resistant to damage and tampering
  • Weather-resistant
  • Good price


Keys can be sticky

Squire Strong Hold Padlock

In terms of overall toughness, the Squire Strong Hold Padlock might just be your best bet. Now, this is not a cheap lock, but you know what they say − you get what you pay for. The Squire Strong Hold Padlock is made with a 50 mm solid steel body, and this is combined with a 10 mm hardened boron alloy steel shackle. 

This is then combined with a 6 PIN tumbler cylinder. All in all, this means that the Squire Strong Hold Padlock is about as tough as it gets; it’s resistant to prying, drilling, cutting, and hammering. 

Moreover, this lock comes with an electrophoretic anti-corrosion finish, something that prevents it from rusting when used for outdoor storage applications. Make no mistake − although the Squire Strong Hold Padlock is not cheap, it is specifically designed for commercial applications where high security is important. 


  • Impact-, drill-, pick- and pry-resistant
  • Weatherproof
  • Very thick and heavy-duty 


A bit expensive


If we had to make a single recommendation, it would be the Squire Strong Hold Padlock. Based on our assessment, this is by far the strongest lock for your storage unit.