Invincible Marine Trailer Hitch Lock Made using the highest quality components Performance and quality tested The most trusted name in marine accessories and equipment Solid brass coupler lock with stainless steel shackle pin Enjoy the peace of mind that comes from knowing your trailer is protected with top-quality, maintenance-free security Simple yet effective, the trailer hitch lock can be used while the trailer is on or off of your vehicle Rock solid construction and heat-treated for toughness, this one-piece lock will not rust, corrode or clog Comes with a 1-year warranty