ITEM NAME:1 to 1 1/8in 1/4 Key Gas Engine Pulley Crank Shaft Sleeve Adapter Predator #gib Store Home Promotion Hot Item Add to Fav.Pet Supplies. Alters pulleys for a different speed or belt. 1 x Set of Engine Shaft Adapter. Adapts larger wheel bores to smaller axels. Step Key Length is about 2". Sleeve length is about 3". Sleeve Keyway slot 1/4".