Specifications:Type: #2 (Fit 8mm-10mm Screws)Tip Size: 5.73mm / 0.23"Hex Shank Size: 6.35mm / 1/4"Total Length: 55mm / 2.17"Material: High Speed SteelFinish: Titanium CoatedPackage Included: 4pcs x Damaged Screw ExtractorDescriptions:Can easily remove stripped, broken, painted over, rusted, embedded screws and bolts from wood or metal surface. Suitable for hex bolts, machine screws, wood screws, sheet metal screws, threaded studs etc..High speed steel tool has high hardness and toughness, wear resistance and heat resistance. Titanium coating provides excellent corrosion resistance, greatly improves wear resistance and hardness, and reduces the coefficient of friction.Work with a power drill and always use a slow speed. The electric hand drill is recommended. Can not be used with the hammer drill.