Trailer Coupler Lock; Hitch Ball And Clamp Type; Fits 1-7/8 Inch/ 2 Inch And 2-5/16 Inch Couplers; Black; Steel Shackle/ Ballistic Grade Nylon Body; 9/16 Inch Shackle; Single 360 Degree Of 'Solid Hardened Steel' Patented Dual Purpose Coupler Lock Fits 1-7/8 Inch/ 2 Inch And 2-5/16 Inch Couplers Ballistic Grade Nylon Housing Absorbs Hammer Blows & Protects Against Weather Premium Universal Unattended Coupler Lock With An Integrated U-Lock Features 9/16 Inch Hardened Steel Shackle Weatherproof And Heavy-Duty Limited Lifetime Warranty 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. Style: Ball And Clamp Compatibility: 1-7/8 Inch/ 2 Inch/ 2-5/16 Inch Trailer Ball Couplers Pin Size (IN): 9/16 Inch Universality: Fully Universal Color: Black Material: Steel Quantity: Single