Feature:1. Application: Pulley crank shaft sleeve adapter works with gas engine crank shafts to enlarge the crank diameter to fit pulleys, gear boxes etc.2. Conversion Size: Gas engine crankshaft sleeve adapter converts a crankshaft from 1in shaft to 1 1/8in shaft. Adapts larger wheel bores to smaller axels.3. Multi Purpose: The pulley crank shaft sleeve adapter can alter motors with a different diameter shaft, alter pulleys for a different speed or belt.4. Practical Part: Bushing sheave reduces the necessity of buying a new motor or pulley to maintain existing components and speed and power requirements.5. Steel Construction: Pulley bore reducer bushing sheave with key is made of steel material, rustproof, not easy to deformation and crack.Specification:Item Type: Pulley Crank Shaft Sleeve AdapterMaterial: Steel .Package List:1 xPulley Crank Shaft Sleeve Adapter1 x Key