SDI Engine Shaft Clutch Alignment Tool Polaris RZR 900 The SDI alignment tool is designed to ensure precise alignment of clutch shafts, enhancing belt performance and durability. Featuring two aluminum crossmembers and adapters tailored for specific clutch shafts, it facilitates optimal clutch positioning effortlessly. Features: Snugly fits over engine shaft and provides a smooth surface for the SDI Alignment Bars to fit over and verify proper positioning