Feature:1. The extractor is used in conjunction with a matching drill for faster extraction, the drill is punched and then the extractor is used to remove the broken screw.2. Strong thread drilling is more powerful. Before taking the broken screw, drill the hole with the drill bit and then take out the screw easily.3. Steel thread with strong toughness, suitable for stainless steel 8.8-12.9 class bolts, do not worry about not taking out.4. Complete tools, you can operate it yourself, with small size, easy to carry and store, convenient to use and with good performance.5. With strict quality control and quality assurance, high safety factor, can be used with peace of mind.Specification:Item Type: Headless Screw Extractor SetMaterial: Chrome molybdenum steel, high speed steelPurpose: Broken screw extractor, easy to remove difficult screwsExtractor specificationsExtractor diameter(approx.)Pilot hole bit size(approx.) 1 Extractor3 - 6mm or 0.1 - 0.2in1.93mm or 0.1in 2 Extractor6 - 8mm or 0.2 - 0.3in2.94mm or 0.1in 3 Extractor8 - 11mm or 0.3 - 0.4in3.96mm or 0.2in 4 Extractor11 - 14mm or 0.4 - 0.6in6.37mm or 0.3in 5 Extractor14 - 18mm or 0.6 - 0.7in7.43mm or 0.3in.Package List:1 x Wrench5 x Extractor5 x Drill Bit1 x Tool Box Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.