Dormer Screw Extractor M20-M30 Screw Extractor Material ID: 8430197 Screw extractor is used counter-clockwise to remove broken right-handed bolts from threaded holes without damaging threads. Its necessary to drill guide hole of proper size before using the extractor. High quality carbon steel Able to withstand flex and high torque loads experienced during operation Left Hand spiral flutes Allows Anti-Clockwise rotation to extract broken screws Square Shank Too allow use with standard Tap Wrench Description Product name M9006 Bolt size M20 - M30 Drill size for low or medium tensile screws - millimeters 10.5 mm Drill size for high tensile screws +75 tons/sq.inch - millimeters 11 mm Bolt size imperial 3/4" - 1" Drill size for low or medium tensile screws - inch 13/32 Drill size for high tensile screws +75 tons/sq.inch - inch 7/16 Cutting diameter step - millimeter 9.53 mm Cutting diameter second cutting step - millimeters (DC_2) 15.9 mm Clamping width - millimeter (WSC) 11.9 mm Clamping Length - millimeter (LSC) 13.1 mm Overall length - millimeter (OAL) 94.4 mm Net weight - grams 118 GBP 19.99 1