Rennsteig double edged screw extractors rennsteig werkzeuge 471 003 3 this size 3 double edged screw extractor from rennsteig is ideal for the damage free removal of broken screws and bolts simply drill into the screw with the appropriate size bit tap the extractor into the hole and loosen the fastener suitable for use with right and left hand threads rennsteig 471 003 3 double edged screw extractor size 3