Drillpro 3 Flute Step Drill Bit TiAlN Coated HRC89 HSS-Co M35 Cobalt Step Drill 1/4 Inch Hexagonal Shank

Description Drillpro 3 Flute Step Drill Bit TiAlN Coated HRC89 HSS Co M35 Cobalt Step Drill 1 4 Inch Hexagonal ShankSpecification BrandDrillproMaterialM35 Cobalt HSS Co CoatedTiAlN CoatedHardnessHRC62 65Flute3 FlutesShank1 4 Inch Hexagonal ShankGrooves3 Spiral GroovesQuantity1 Pc x Step Drill Bit Size ModelStepsSize4 12mm54 6 8 10 12mm4 12mm94 5 6 7 8 9 10 11 12mm4 22mm104 6 8 10 12 14 16 18 20 22mm5 23mm105 7 9 11 13 15 17 19 21 23mm4 32mm154 6 8 10 12 14 16 18 20 22 24 26 28 30 32mmFeatures Suitable for aluminum insulation board PVC board chamfering steel aluminum sheet metal carbon steel 304 stainless steel etc 3 slot 3 spiral slot design Large chip removal fast heat dissipation fast drilling low vibration high stability and high drilling accuracy 1 4 inch hexagon handle 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 x 3 Flute Step Drill Bit More Details