Designed for 1969 to 2006 Big Twins. This tool will install the seal on the Sprocket Shaft Motor of the engine case. You will need the Harley Davidson Sprocket Shaft Bearing Installer tool to use the seal tool. Simply search for "Harley Davidson Sprocket Shaft Bearing Installer Twin" on eBay Search. This tool is brand new. Machined From One Block of Steel, Not A Casting! Tool comes with black oxide finish preventing corrosion to assure many years of service.