Ensoleille - shining house hss Step Drill Bit 6-60mm Spiral Slot Conical Cutter 12 Steps For Screwdriver Drilling on Steel Brass Wood Plastic,etc

Step Drill Bits Size: 6-60mm (12 steps: 6,10,15,20,25,30,35,40,45,50,55,60mm). Shank Diameter: 13mm. Step Drill Bit Material: HSS 4241 Application: ;Step suitable for workpieces with hardness below 25°, such as ;carbon steel, sheet metal, insulation board, PVC board, plank and wood. ;Workpiece thickness under 5mm. Note: Use water cooling in drilling to extend the life of the drill bit. Recommended drilling speed 250-400rpm. Spiral grooved slot: 135 Split point tip and double flute design for self-centering and deburring, spiral groove helps remove chips while drilling. Features: 6-60mm pitch drill bit suitable for workpieces with hardness below 25°, such as carbon steel, sheet metal, insulation board, PVC board, plank and wood. Plate thickness under 5mm Use cooling water in drilling to extend the life of the drill bit. Recommended drilling speed 250-400rpm. Spiral cutting flute: 135 Double-pointed tip and double flute for self-centering and deburring. Spiral flute helps clear chips