this is some good shit if you have enough room to attack it with a hammer. You pound it onto a rounded off bolt head and then turn it with a wrench. the teeth are made so that as you apply pressure, it digs in harder. works good, gives you an option better than drilling and tapping.
Craftsman always seems to come out with some very innovative tools. Plus you can't beat the lifetime guarantee. Hey maybe I should go get a job at Sears in the tool dept.
Hey maybe I should go get a job at Sears in the tool dept. 
