Head studs, main studs, carburettor studs, or any other stud can be problematic when it's time to remove them.
This tool is designed to remove difficult threaded studs or install them.
Sizes from 1/4" to 3/4" (M5 - M18).
All that's required is a 1/2" DR ratchet.
Cam rotates to grip onto the stud for quick and easy use.