Bosch 3 Piece HSS Step Drill Bit Set

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