Features: Great Compatibility — Works on 2005~2011 GM Duramax 6.6L Engines. Works in an easier way to save your time and money. Upgrade Design — Safely pulls the injectors from the cylinder heads without pulling the injector cups and without causing damage to the injector body. Superior Quality — Advanced heavy duty steel with black oxide finish, durability, impact and wear resistance, anti-corrosion and anti-rust. High precision and hardness to provide a much longer service life. .