M35 Cobalt Coated Step Drill Bit 1/4 Inch Hex Shank High Speed Steel Metal Drilling Hole Opener for Stainless Steel(4-20mm)

To removing chips, with big space and small resistance; Smooth chip removal, less heating value,Sharp cutting edge, reduce cutting force, lower breaking rate and improve the quality of hole wall;Uses:Suitable for Aluminum, insulation board, PVC board chamfer,steel, aluminum, sheet metal, carbon steel, 304 stainless steel, etc.Shank: 1/4 Inch Hexagon ShankHardness: HRC89Step Height: 5mmSize:3-12: 3,4,5,6,7,8,9,10,12mm3-13: 3,4,5,6,7,8,9,10,11,12,13mm4-12: 4,5,6,7,8,9,10,11,12mm4-20: 4,6,8,10,12,14,16,18,20mm4-22: 4,6,8,10,12,14,16,18,22mm6-25: 6,8,10,12,14,16,18,20,22,25mm5-27: 5,7,9,11,13,15,17,19,21,23,25,27mm6-35: 6,8,10,12,16,18,20,22,25,28,30,32,35mmFeatures:1. Spiral groove design(Great chip removal).2. 118 ° X type bit design(No slipping, drill from any angle).3. Double R 1/4 Inch Hexagon shank design.4. CNC, CBN grinding wheel(Higher accuracy).5. A substantial increase in the wear resistance and oxidation resistance.Package Included:1 x M35 Step Drill

• To removing chips, with big space and small resistance; Smooth chip removal, less heating value,
• Sharp cutting edge, reduce cutting force, lower breaking rate and improve the quality of hole wall;
• Precision machining by high accurate equipment;
• With good milling and cutting performance, ensuring high efficiency;
• High hardness, wear resistance, and intensity; anti-bending;
• To removing chips, with big space and small resistance; Smooth chip removal, less heating value,
• Sharp cutting edge, reduce cutting force, lower breaking rate and improve the quality of hole wall;
• Symmetrical cutting blade, help to high effective cutting, avoiding drilling offset.