1Made of superior high speed steel, high hardness and anti-corrosion. 2Each tap extractor is specifically engineered for speedy grab-it and easy out broken screw taps. 3Works for removing stripped, rusted, broken, or corroded screws and bolts. 4Every tap extractor goes through rigorous quality testing, durable to use. 5Suitable for industrial screw and bolt removal and for every home repair work.Features: Made of superior high speed steel, high hardness and anti-corrosion. Each tap extractor is specifically engineered for speedy grab-it and easy out broken screw taps. Works for removing stripped, rusted, broken, or corroded screws and bolts. Every tap extractor goes through rigorous quality testing, durable to use. Suitable for industrial screw and bolt removal and for every home repair work.Specification: Condition: brand new Material: High Speed Steel Weight & Model: (Optional) A 108g/3.8oz (six-piece set)SpecificationMetric SystemBritish / AmericanSystem1 M46 2 M58-10 3 M612 -1/44 M7-8