Keyed 5/8" bore split taper H bushing For pulley/sheave. This is a high-quality steel bushing made for pulleys that require a H style bushing. This bushing inserts into the center of the pulley and slides over the shaft. As you tighten down the bolts on the H bushing it will tighten down on the shaft. This style is much more secure than a standard 1 piece pulley. This listing includes an H bushing to fit on a keyed 5/8" shaft. Specifications: 5/8" Bushing Solid Steel Bushing For Use on 5/8" Shaft