Rennsteig spiral screw extractors rennsteig werkzeuge 470 007 3 this spiral screw extractor from rennsteig is ideal for removing broken screws or bolts without damaging expensive components simply drill a hole with an appropriately sized bit tap the extractor into the hole and loosen the fastener suitable for both right and left hand threads rennsteig 470 007 3 spiral screw extractor size 7