I have removed many a stubborn screw by cutting a slot with a small fiber
wheel then using an impact screw driver with a common tip. I've done it so
many times I buy the bulk packs of the small fiber wheels to use in my
rotary hand piece.
Polytechforum.com is a website by engineers for engineers. It is not affiliated with any of manufacturers or vendors discussed here.
All logos and trade names are the property of their respective owners.