Bosch 3 Piece HSS-AlTiN Step Drill Bit Set

The Bosch 3 Piece HSS-AlTiN Step Drill Bit Set is a set of step drill bits designed for smooth, burr-free drilling in several diameters with a single bit. It suits drilling round holes, enlarging existing holes and deburring. The split-point tip allows an easy start, so pre-punching is not necessary. Each bit has a CNC ground spiral flute for optimised chip removal and less vibration, giving more even drilling. Axial and radial relief grinding delivers high cutting performance and a smooth finish. The 3-flat shank helps prevent slipping in the chuck of rotary drills and drivers. These step drill bits are suitable for thin materials, including sheet steel, stainless steel, non-ferrous metals, sheet plastic and plastic. They are made from HSS (high-speed steel) with an AlTiN (aluminium titanium nitride) coating, which offers maximum lifetime when used with coolant. Laser-marked hole diameters in both spiral flutes are easy to see and durable. Features and Benefits: • Drills several diameters with one bit • Split-point tip allows an easy start without pre-punching • CNC ground spiral flute for optimised chip removal and less vibration • Axial and radial relief grinding for high cutting smoothness • AlTiN coating for maximum lifetime when used with coolant • Laser-marked hole diameters in both spiral flutes • 3-flat shank prevents slipping and provides high-torque transmission Specifications: Net Weight: 0.386 kg Shank Diameter: 6.0/8.0/10.0 mm Total Length: 66.5/70.5/93.5 mm Step Height: 4.0/4.0/4.0 mm Step Diameter (Range): 4-12/4-20/6-30 mm Contents: HSS-AlTiN step drill bit: 4-12 mm step diameter; 6 mm shank diameter HSS-AlTiN step drill bit: 4-20 mm step diameter; 8 mm shank diameter HSS-AlTiN step drill bit: 6-30 mm step diameter; 10 mm shank diameter