Bosch Professional HSS Step Drill Bit (4-20mm), 9 Steps, 1/4" Hex Shank ( 2608597524 )

HIGHLIGHTS:

The Bosch Professional HSS Step Drill Bit 4–20mm (2608597524) is a precision drilling accessory designed for clean, multi-diameter hole drilling in sheet metal, plastics, and non-ferrous materials. With a stepped geometry featuring 9 progressive cutting stages, it allows multiple hole sizes to be drilled using a single bit—eliminating the need for frequent tool changes.

Built from high-speed steel (HSS), this step drill bit delivers high durability, smooth cutting performance, and efficient chip removal. The split-point tip design enables easy starting without pre-punching, while the CNC-ground spiral flute ensures reduced vibration and stable drilling performance.

The 1/4" hex shank provides a secure connection in drill chucks and impact drivers, ensuring maximum torque transfer and reduced slipping. Laser-marked step sizes improve visibility and accuracy during operation.

This tool is optimized for professional applications requiring clean, burr-free holes ranging from 4mm to 20mm, making it ideal for electrical installations, HVAC work, automotive panels, and general metal fabrication.

FEATURES:

• 9-Step Cutting Geometry for multiple hole diameters (4–20mm)
• High-Speed Steel (HSS) Construction for long tool life
• Split-Point Tip for easy, precise starting without center punching
• CNC-Ground Spiral Flute for efficient chip removal and low vibration
• 1/4" Hex Shank for secure grip and high torque transmission
• Laser-Etched Step Markings for accurate drilling control
• Clean Burr-Free Drilling in thin sheet materials

Ideal for electricians, metal fabricators, and installers needing a versatile step drill solution for fast, accurate hole enlargement in thin materials.