Bosch HSS Step Drill Bit

The Bosch HSS Step Drill Bit is the versatile, one-bit solution for drilling multiple hole diameters without the need to swap bits between jobs. Ideal for deburring, drilling clean round holes, and enlarging existing openings, it eliminates the need for pre-punching thanks to its split-point tip, which ensures an easy, accurate start every time.

Suitable for use on thin materials including non-ferrous metals, sheet plastic, sheet steel and stainless steel, it delivers smooth, burr-free results across a wide range of applications. The CNC ground spiral flute optimises chip removal and reduces vibration, while axial and radial relief grinding ensures the highest levels of cutting smoothness. Laser-marked diameter figures in both spiral flutes provide clear, durable reference points throughout the life of the bit. The 3-flat shank prevents slipping in the chuck and delivers powerful high-torque transmission. Available in sizes ranging from 4mm to 40.5mm across the range.

Features and Benefits:
• Smooth, burr-free drilling in several diameters with a single bit
• Split-point tip for an easy start — no pre-punching required
• CNC ground spiral flute for optimised chip removal and reduced vibration
• Axial and radial relief grinding for maximum cutting smoothness
• Made from HSS (high-speed steel) for long service life — enhanced with coolant
• Laser-marked hole diameter figures in both spiral flutes for clear, durable reference
• 3-flat shank prevents slipping and ensures high-torque transmission