SDI Engine Shaft Clutch Alignment Tool Polaris RZR 900 / 1000 / Turbo / General 1000 / 4 The SDI alignment tool enables precise positioning of the clutches for optimal belt performance. Fast and easy clutch shaft alignment verification it features two aluminum crossmembers and appropriate adapters for the clutch shafts. Features: Snugly fits over engine shaft and provides a smooth surface for the SDI Alignment Bars to fit over and verify proper positioning