Drillpro 3 Flute 4-12mm 5-23mm Step Drill Bit TiAlN Coated HRC62-65 HSS-Co M35 Cobalt Step Drill Triangular Shank

Description Drillpro 3 Flute 4 12mm 5 23mm Step Drill Bit TiAlN Coated HRC62 65 HSS Co M35 Cobalt Step Drill Triangular ShankSpecification BrandDrillproMaterialM35 Cobalt HSS Co CoatedTiAlN CoatedHardnessHRC62 65Flute3 FlutesShankTriangular ShankGrooves3 Spiral GroovesQuantity1 Pc x Step Drill BitSize ModelStepsSize4 12mm94 5 6 7 8 9 10 11 12mm5 23mm105 7 9 11 13 15 17 19 21 23mmFeatures Suitable for 1mm stainless steel plate 3mm iron plate steel copper plastic wood plate 3 slot 3 spiral slot design Large chip removal fast heat dissipation fast drilling low vibration high stability and high drilling accuracy Triangular shank design suitable for many types of electric drills HSS Co M35 4241 quenched high speed steel material the hardness is the same as 6542 material Industrial grade TiAlN Plating 1 Form Al2O3 protection cover fit for high speed drilling 2 Can work without coolant 3 Hardness up to HRC62 65 4 Life service 2 3 times longer than common HSS Co M35 step drill Package Included 1 x3 Flute Step Drill BitMore Details