This tool is easier to use due to a simpler design and each part is manufactured to OEM specifications. Premium grade CNC heavy duty steel with black oxide finish, durability, anti-corrosion and anti-rust. High precision and hardness to provide a much longer service life. Used to install the front and rear crankshaft wear sleeves and seals. It eliminates lip flare on the wear sleeve and installs the seals properly without leakage.