The BulletProof Latch Lock is a great way to ensure your coupler stays locked onto your hitch. It's simple threaded design is easy to use and is effective again trailer theft. This lock can be purchased keyed alike to other BulletProof Locking Products. Our universal design is compatible with all 1-7/8", 2" and 2-5/16" couplers. All BulletProof locks are treated with an aircraft-grade lubricant for longevity comes with 2 keys.