EZ Loader Boat Trailer leaf spring mounting kit. This kit will fit EZ Loader trailers that use a 9/16" bolt. If you have a 1/2" bolt, the bolt hole will need to be drilled out. Includes two 9/16 bolts, two 9/16 nuts, two nylon bushings, and two steel bushings. Nylon Bushing - 1.00"OD x 1.75"L. Steel Bushing - 0.59"ID x 1.96"L.