The BulletProof Medium Duty Coupler Lock provides cost-effective protection against trailer theft. With a 1/2" hardened solid steel bar and pick-resistant lock, it is a great option for trailer protection. This lock can also be purchased keyed alike to other BulletProof Locking Products.

Our universal design is compatible with most 1-7/8", 2" and 2-5/16" couplers.

All BulletProof locks are treated with an aircraft-grade lubricant for longevity, the locking mechanism is protected by a heavy-duty rubber cap and comes with 2 keys. 

Note: Must be ordered in combo packs for key codes to match. If larger quantities are required, please contact us for assistance.

BUNDLE OPTION: Protect what you tow with the BulletProof Trailer Lock Set. Offering all-around trailer security, whether you're hauling for work or your next adventure. This essential bundle covers your most vulnerable connection points - your hitch, coupler, and trailer latch. Bundle comes with:

1 - BulletProof 5/8" Stainless Steel Locking Pin
1 - BulletProof Medium Duty Coupler Lock
1 - BulletProof Trailer Latch Lock
6 - Matching Keys

*PATENT PENDING