Use to replace heel jaws on pipe wrenches which is the lower, stationary jaw that grips the pipe or pipe fitting.

Use to replace hook jaws on pipe wrenches which is the moveable part that opens and closes onto the pipe or pipe fitting.

Use to replace the adjustment nut on pipe wrenches that moves the hook jaw, the moveable part that opens and closes onto the pipe or pipe fitting.

Use to replace the springs in the pipe wrench housing so the hook jaw, the moveable part that opens and closes, will pivot slightly for the proper ratcheting action of the pipe wrench and a secure grip on the pipe or pipe fitting.