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The Bosch 3 Piece HSS Step Drill Bit Set is a set of cone and stepped 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 in thin materials. The split-point tip allows an easy start, so pre-punching is not necessary. A CNC ground spiral flute provides optimised chip removal and less vibration for even drilling, while axial and radial relief grinding delivers cutting smoothness. The 3-flat shank helps prevent slipping in the chuck of rotary drills and drivers. Suitable for thin materials including sheet steel, stainless steel, non-ferrous metals, sheet plastic and plastic. Made from HSS (high-speed steel), the bits offer a long lifetime when used with coolant. Laser-marked hole diameters in both spiral flutes are easy to see and durable, so you can quickly identify the size you are drilling. Features and Benefits: • Drills several diameters with one bit • Split-point tip for an easy start without pre-punching • 3-flat shank prevents slipping in the chuck • CNC ground spiral flute for optimised chip removal and less vibration • Axial and radial relief grinding for cutting smoothness • HSS construction for a long lifetime when used with coolant • Laser-marked hole diameters for easy identification Specifications: Net Weight: 0.365 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 step drill bit: 4-12 mm step diameter; 6 mm shank diameter HSS step drill bit: 4-20 mm step diameter; 8 mm shank diameter HSS step drill bit: 6-30 mm step diameter; 10 mm shank diameter
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