Trimax UMAX50D UMAX 50D Universal Trailer Lock

One size fits all! Fits all coupler types in sizes 1-7/8", 2" and 2-5/16". Has a hardened 5/8"-16mm steel shackle. With rugged corrosion resistant finish. A key hole cover helps seal out dirt and grime. Reinforced armored shoulder guard resists hammer strikes and saw cuts.