For pricechoose optionsSelect Option M12-M14 M14-M20 M20-M30 M30-M42 M42-M45 M45-M50 M5-M6 M6-M8 M8-M12 Quantity Add to Basket The Dormer M900 Screw Extractors can be used counter-clockwise to remove broken right-handed bolts & screws from threaded holes without damaging threads. It’s necessary to drill a guide hole of proper size before using the extractor.