Trimax universal dual purpose coupler locks fit all couplers from 1 7/8", 2", to 2 5/16", all coupler types. Available in 2 models. UMAX100 which features 360 degrees of Solid Hardened Steel and UMAX50 which is made of Die Cast rugged corrosion resistant finish. Both provide instant security for your camper, boat or trailer when they are not hooked up to your vehicle.
