Material: HSS (4341) High hardness, rustproof, solid and durable, Back tapered beyond tap to prevent thread damage from over-drilling.
Metric: M3x0.5, M4x0.7, M5x0.8, M6x1, M8x1.25, M10x1.5.Shank:1/4 inch (6.35mm) hex shank
Self-centering design: do not need additional center drilling or center punching.It could decrease processing steps greatly, save time and improve working efficiency
Drilling and tapping at the same time, save you time and effort.6 sizes in one drill and tap bit set (M3, M4, M5, M6, M8, M10) to meet your diversified requirements
Made of high quality HSS 4341 Suitable for drilling, tapping, cutting on soft metal, aluminum plate, iron, wood, plank, plastic etc.Note:Work VERY slowly and carefully with these bits when drilling metal. Low Speed and Cutting holes in materials(Thickness :<3mm) [amz_corss_sell asin="B01DIWWT0A"]