The best cargo container lock! This lock is just what we needed to keep our personal belongings secure in our storage container! While it COULD still be cut with a grinder, it would take substantially more time than bolt cutters on a standard padlock. The only thing improvement I would suggest is having smaller holes closer together, since this sits somewhat loosely (it still cannot be removed though!).
Shipping Container Door Bar Lock System (Heavy Duty)
Shipping Container Door Bar Lock System (Heavy Duty)
Strong lock. Using this on a cargo container being used as a storage unit. The combo lock feature works so multiple people can use it.
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Protects Against Theft
Universal Fit
Heavy-Duty Steel Construction
Tamper-Resistant Protection
Description
Description
Heavy-Duty Shipping Container Lock – Ultimate Theft Protection
Secure your valuables with our Heavy-Duty Shipping Container Lock System, designed for maximum protection against theft and unauthorized access. Whether you need security for shipping containers, semi-trailers, trucks, or storage units, this universal lock provides rock-solid defense.
Unmatched Security & Versatility
✔ Universal Fit – Securely locks both doors of shipping containers, trailers, and storage units.
✔ Adjustable Design – Fits vertical door bars spaced 9-3/4" to 16" apart for a perfect fit.
✔ Heavy-Duty Steel Construction – Built with 2" and 2-1/2" square steel tubing with 3/16" thick walls for extreme durability.
✔ Choice of Locking Mechanism – Available in keyed or combination lock varieties for added convenience.
✔ Tamper-Resistant Protection – 6-inch reinforced end plates provide extra strength against break-ins.
Effortless Protection for Your Container
This easy-to-install security solution is a must-have for contractors, business owners, and anyone storing valuable equipment in a shipping container. Designed to resist cutting, prying, and tampering, it’s the ideal solution for quick, reliable theft prevention.
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Easy. Functional. Super Secure
This shipping container door bar locking system is one of the most simple and secure ways to keep your shipping container locked.
Keep your items safe and secure with either the standard or heavy duty models of this easy-use locking system
Extremely strong and simple security
How to use our heavy duty container bar lock
Struggling with stiff doors too? The easy-open door bar makes opening rusty cargo doors effortless. Replacing worn hardware? See door lock parts, or browse all container locks.
How to use
How to use
- Determine an easy access location to install the Cargo Door Lock. Installation can be in a manner so you can slide it up the locking bars to unlock.
- Separate the two halves of the Cargo Door Lock aligning them so the lock mechanism and holes are both facing downward.
- Separate the two halves of the Cargo Door Lock by sliding them away from each other removing them from the door.
- Slide the two halves together by inserting the smaller tube into the larger tube.
- Secure the Cargo Door Lock as tight as possible on both doors’ locking arms and depress the locking button with key removed or turn dials. NOTE: Minor adjustments may be made to align the locking pin and holes.
- Your Cargo Door Lock is properly installed. Secure your keys in a safe location.
How to reset your code: Combination Lock Only
To open the lock for the first time: SET the combination to 0-0-0-0. DEPRESS the shackle and PULL open.
To set your own combination: (Remember: Combination can only be set when the lock is open)
- INSERT “reset tool" (enclosed in package) in hole inside of lock.
- PUSH key in and TURN 90 degrees in either direction.(key automatically stays in this position). Failure to exert force while pushing the key in will result in a failed attempt to set or re-set combination.
- While pressing down on the shackle inside the lock chamber, SET wheels to desired combination, be sure to set wheels precisely on numbers.
- TURN and remove reset tool, Lock in now set to new 4 digit combination, Be sure to record your secret combination.
To Lock: SCRAMBLE the wheels and CLOSE the shackle.
Shipping Container Door Bar Lock System (Heavy Duty)
Heavy Duty - Keyed Differently

Easy. Functional. Super Secure.
Security
Provides powerful protection against theft and unauthorized access
Versatility
Fits containers, trailers, trucks, and storage units with ease
Durability
Constructed from thick, heavy-duty steel for maximum strength
Tamperproof
Reinforced plates resist cutting, prying, and tampering
What Our Customers Say
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Jennifer H.
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Joe B.
Strong lock. Using this on a cargo container being used as a storage unit. The combo lock feature works so multiple people can use it.
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Mike B.
I use this to lock down my shipping container. It is hardened steel and adds to the security of any shipping container. I recommend.
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Todd P.
Using this on a cargo container being used as a storage unit. The combo lock feature works so multiple people can use it.
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Guy D.
I bought this lock to provide added security on a storage container on our property. Have had it for several years now, with no issues. Product is made of heavy gauge steel, fits around the locking bars for the doors to the container. Great product.
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Allen L.
Fits the bill. Easy to use and works great for its intent.
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Jesse J.
After I got it someone tried to get in the trailer and it stopped them
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Damon D.
These locks get the job done probably better than padlocks.
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Carolyn J.
Great product!
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Victoria C.
Our key lock arrived securely packaged with easy to follow easy to read color instructions It fit our container with a few adjustments. I like that the key lock is on the bottom, not visible and had a little cover. Of little concern is I have a white container with a vibrant blue lock attached which screams for attention. Fortunately the container is not readily accessible or visible to the public. I do recommend this lock though.
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Nathan R.
Good product and worth the money.
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Jim G.
This locking system is very secure and works perfectly.
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Slug H.
Easy to use, durable, secure.
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Duane D.
The product is very easy to use and good quality.
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Scott S.
Easy to install. I bought 2 and wish they would give an option for keyed alike but still a good product.
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Debbie I.
We have a conex full of goodies and we want to keep them safe. We were using just a pad lock till we seen this. So far it’s so much easier to get all valuables locked up fast especially if rain is about to approach you as we’re getting packed to go home.
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Roger Y.
Easy to use, great value – these shipping containers are the best! Seen the videos in Los Angeles where the containers on slow moving trains are robbed and pillaged by thieves? If they use these container locks none of this would happen!
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4.5
Bought a storage container. Experienced seller/dealer advised that experienced thieves are adept at breaking container manufacturer’s standard lock mechanism. He advised I add my own chain & lock. I thought of designing my own heavy duty locking device then I found this one on Amazon. This will discourage even the most experienced thieves. There were negative review comments on the barrel lock and key. To address this I will be lubricating the lock with a dry graphite lubricant that will not attract dust & dirt.
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Zhenyoung C.
Good quality and very practical.
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Kyle S.
Used this on a connex that holds more than 50k in product in a not so great area of the city. Much easier than fiddling with a few locks in the dark hours of the morning. The lock is solid and very secure. Im sure thieves will think twice with this lock on.
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Summer B.
It’s really good and more safety.
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Kristen S.
Works great. Bit pricey but better than someone breaking into our containers.
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Nicholas M.
My container doors don’t fully close which made it difficult to lock. This lock had just enough give to reach both doors and securely lock. Very happy with the results.
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Manny C.
Using this on a cargo container being used as a storage unit. The combo lock feature works so multiple people can use it
Frequently Asked Questions
What size container door bars does this lock fit?
It is adjustable to fit vertical door bars spaced 9-3/4 inches to 16 inches apart, which covers standard shipping container doors as well as most semi-trailers, trucks, and storage units. That adjustable range is what makes it a universal fit across different container brands.
How does a door bar lock stop break-ins?
The lock clamps over your container's vertical locking bars and handles, so the bars cannot be rotated to open the doors. Built from 2 inch and 2-1/2 inch square steel tubing with 3/16 inch thick walls and 6 inch reinforced end plates, it is designed to resist cutting, prying, and tampering, the most common ways thieves attack container doors.
Should I choose the keyed or combination version?
Both offer the same heavy-duty protection, so it comes down to preference. Choose keyed if you want a physical key, or choose the combination version if you would rather not manage keys and want to share access with a code instead.
Is the door bar lock hard to install?
No. It is designed for quick, tool-free installation, you fit it over the container's locking bars and secure it, with no drilling or permanent mounting required. That makes it easy to move between containers or remove entirely when needed.
Questions About Products?
Whether you need more details, have a specific use case in mind, or just want to make sure you're choosing the right accessory — submit your question below and a member of our team will get back to you shortly.