Description Drillpro 6pcs M3 M10 Combination Drill Tap Bit Set HSS 6542 Blue Nano Coated Deburr Countersink Drill BitsSpecification Product nameTap drill bitModel numberB82685MaterialHigh Speed Steel 6542Shank1 4 6 35mm hexagon shankCoatingBlue Nano CoatedSizeM3x0 5 M4x0 7 M5x0 8 M6x1 M8x1 25 M10x1 5SizeBit Diameter mm Shank Diameter mm Shank Length mm Blade Length mm Total Length mm M3x0 53 06 35412565M4x0 74 16 35363166M5x0 85 06 35363267M6x16 06 35343468M8x1 258 16 35333869M10x1 510 06 35324070Features  1 The blue nano coating will protect you drill bit well and make a better drill performance and use life 2 High hardness rustproof solid and durable 3 The advantage is opening tapping chamfering 4 Self centering point do not need assistant center drilling or center punching 5 Suitable for drilling tapping cutting on soft metal aluminum plate iron etc 6 Drilling and tapping in one one step processing greatly save processing steps and time costs improve working efficiency 7 HSS6542 M2 is of higher hardness and more durable than the HSS4341 and is suitable for cutting the steel even the 2mm 304 steel Package Included 6xTap drill bitsMore Details