Screw Extractor Material ID: 8430193 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 M9002 Bolt size M6 - M8 Drill size for low or medium tensile screws - millimeters 2.8 mm Drill size for high tensile screws +75 tons/sq.inch - millimeters 3 mm Bolt size imperial 1/4" - 5/16" Drill size for low or medium tensile screws - inch 7/64 Drill size for high tensile screws +75 tons/sq.inch - inch 1/8 Cutting diameter step - millimeter 2.18 mm Cutting diameter second cutting step - millimeters (DC_2) 4.8 mm Clamping width - millimeter (WSC) 3.9 mm Clamping Length - millimeter (LSC) 6.7