●Portable: 5/8" diameter plug lock is small and easy to carry, can be applied to trucks, trailers, RVs and cars ●Safety: Sturdy stainless steel is waterproof and black waterproof dustproof cap can effectively protect the core components of the lock from damage ●HIGH QUALITY: The plug lock is made of solid stainless steel material, high strength, sturdy and not easy to bend, long service life ●STURDY CONSTRUCTION: High strength hardened construction with chrome plated surface protects trailer and trailer hitch ball mounts from theft ●Easy to operate: 1/4 turn and lock when you hear a "click" audio, making installation easy and convenient