All Trailer Coupler Locks

A trailer hitch lock is only as strong as the materials and manufacturing behind it. At Proven Industries, every hitch lock and coupler lock in this collection is built from high-strength steel, machined for a precise fit, and assembled right here in the USA — because a lock that doesn't fit is a lock that fails.

We manufacture trailer hitch locks and coupler locks for every trailer type and every hitch configuration. Whether you're securing a utility trailer with a standard 2" coupler, an RV with a 2-5/16" ball mount, a gooseneck rig, or a specialty setup, you'll find a lock engineered to fit your exact application — not a universal design that leaves gaps a thief can exploit.

Every lock in this collection ships standard with our patented Cobra lock core — a high-security tubular keyway that can't be copied at a hardware store and is designed to resist picking, drilling, and forced entry. You also have the option to upgrade to our Proven Disc Detainer core for maximum security in high-risk environments.

All orders placed before 2pm EST ship the same day. Our locks come with a lifetime warranty, and if you're not sure which lock fits your trailer, our team will confirm your fitment before you order.

Shop our full line of trailer hitch locks below, or use the trailer type filters to find your exact fit.