✦ CR-MO steel with black bronzed surface
✦ for loosening damaged screws and nuts
✦ suitable for impact wrenches
✦ the innovative spiral profile digs itself into the head of a damaged
　screw/nut and thereby allows to loosen it securely
✦ sizes: 10-11-12-13-14-15-16-17-19 mm
✦ 1-straight rod:  12 mm(dia.) x 80 mmL