Trimax Dual Force Clamp Style Trailer Lock TRIMAX makes the worlds toughest locks. Through value added engineering design, TRIMAX is committed to product innovation that holds up to the highest quality standards. TRIMAX provides maximum security for marine, trailer and tow, RV, performance truck, power sports and bicycle applications. Tested. Tough. Weight: 5.0000 Compatibility: 1-7/8 Inch/ 2 Inch/ 2-5/16 Inch Couplers Style: Hitch Ball And Clamp Pin Size (IN): 4-1/2 Inch Color: Black Material: Steel Quantity: Single Features:Premium Universal 360 Degree Of "Solid Hardened Steel" Dual Purpose Coupler LockKey Hole Cover Slides Up To Seal Out Dirt And GrimeAttractive Ballistic Grade Nylon Housing Absorbs Hammer Blows And Protects Against WeatherType A Key Which Is A Spring Loaded, 7 Pin, High Security Key. Resists Attempted Drill Outs. Rugged And Durable, The Key Will Not Bend Or BreakEasy To InstallLimited Lifetime Warranty