I had to replace some cam and crank seals on a toyota camry v6 with 220k miles on it and the cam gears have never been off.. Torque is supposed to be 65ft. lbs... I ended up having to make this tool up to hold the gear and then use this extension on a craftsmen 1/2 ratchet to get it loose... broke 2 craftsmen ratchets in the process, well over 350 ft.lbs