Increases your efficiency : Thread-conserving removal of the screw without damage. Product dimensions : 120 x 11 x 11 mm (LxWxD) Application : Simply hammer in the extractor, position the ring spanner to the bottom and screw out without tilting. For thread-conserving removal of damaged or broken-off screws with left-hand or right-hand thread, particularly stripped hex screws. Material : Tough-yet-flexible chrome-vanadium molybdenum steel, through-hardened, bronzed.