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The 6mm - 39mm Bosch HSS-AlTiN Step Drill Bit gives you an extended size range for bigger holes in thin materials. It is well suited to trades such as sheet metalwork, where one bit can enlarge existing holes or drill clean round holes in sheet steel, stainless steel, non-ferrous metals and plastics. The split-point tip allows an easy start without pre-punching, and the CNC ground spiral flute helps remove chips and limit vibration. Laser-marked hole diameters are easy to read, and the AlTiN-coated HSS construction needs no coolant. Features and Benefits: • Smooth drilling in several diameters with one drill bit • 3-flat shank prevents slipping in the chuck and transmits high torque • CNC ground spiral flute for optimised chip removal and less vibration • Axial and radial relief grinding for the highest cutting smoothness • AlTiN coating for maximum lifetime • Laser-marked hole diameters on both spiral flutes Specifications: Diameter Range: 6mm - 39mm Material: HSS Coating: AlTiN Shank: 3-flat
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