Tap Size7 sizes: M3 M4 M5 M6 M8 M10 M12. It can meet your different size needs. High Quality MaterialThe machine tap is made of HSS 6542 (suitable for ordinary stainless steel and other hard materials) with titanium coated threaded screw bits. The surface treatment was carried out with nitrogen. Due to the very high hardness, fast cutting is possible and high temperatures are not a problem. High performance Good cutting ability, rust-free, sturdy and durable. Small and easy to carry. Thanks to the square shank, it can be easily installed without loosening or slipping. ApplicationSuitable for stainless steel, metal, alloy steel, aluminum sheet, wood and low carbon steel. , it is suitable for blind holes. AdvantagesThanks to the perforation, the chips are easily removed and you can work at high speed. A high degree of precision is achieved with the tools.