Bosch Hex Shank HSS Step Drill Bit

The Bosch Hex Shank HSS Step Drill Bit is a versatile stepped drill bit designed to drill multiple hole diameters with a single bit, delivering smooth, burr-free results in thin sheet materials.

The split-point tip eliminates the need for pre-punching, allowing for a clean, accurate start without the bit wandering. A CNC ground spiral flute optimises chip removal and reduces vibration, while axial and radial relief grinding ensures consistent cutting performance and a smooth finish throughout each step.

This step drill bit is suitable for use on non-ferrous metals, sheet steel, stainless steel, and sheet plastic — making it a practical choice for electricians, fabricators, and engineers working with thin materials. The ¼" hex shank provides a secure, positive connection in both three-jaw chucks and ¼" internal hex tool holders. Laser-marked diameter figures on both spiral flutes remain clearly visible throughout the life of the bit.

Features and Benefits:
• Drills multiple diameters from 4mm to 20mm with a single bit
• Split-point tip for easy, accurate starts without pre-punching
• CNC ground spiral flute for optimised chip removal and reduced vibration
• Axial and radial relief grinding for consistent cutting performance and smooth finish
• ¼" hex shank for secure connection in three-jaw chucks and hex tool holders
• HSS construction for long service life — extended further with coolant use
• Laser-marked diameter figures on both flutes for easy, durable identification

Specifications:
Total length: 70.5mm
Shank diameter: ¼" (1/4 inch)
Step diameter range: 4–20mm
Step height: 4mm
Material: HSS (High-Speed Steel)
Net weight: 0.077kg