Had two 8-32 screws with stripped hex heads. I could have drilled them out or used a hacksaw, but I didn't want to take a chance at marring the fixture they were in. I invested in a set of metric and SAE sets which arrived several days after ordering. I crossed my fingers, eyes and toes, hammered in the appropriate size, and much to my surprise, both screws were easily backed out! The GRIPEDGE tool saved the day and my a**!