Bosch Professional HSS Step Drill Bit, 3-flat Shank (6-39 mm), 12 Steps ( 2608597521 )

HIGHLIGHTS:

The Bosch Professional HSS Step Drill Bit (2608597521) is designed for smooth and precise drilling of multiple hole diameters using a single drill bit. Covering a drilling range of 6mm to 39mm across 12 steps, it eliminates the need to switch between multiple drill bits, making it an efficient solution for sheet metal fabrication, electrical installations, maintenance work, and general workshop applications. 

Manufactured from High-Speed Steel (HSS), the bit delivers long service life and reliable cutting performance when drilling metals, non-ferrous materials, plastics, and composite materials. The split-point tip allows easy starting without pre-punching, helping improve accuracy and reduce walking during drilling.

Its CNC-ground spiral flute design promotes efficient chip evacuation while reducing vibration for smoother drilling performance. Bosch also incorporates axial and radial relief grinding to provide exceptional cutting smoothness and precise hole quality throughout the drilling process. 

The 3-flat shank design ensures high torque transmission and helps prevent slipping inside the chuck, making it suitable for rotary drills and drill drivers operating under demanding conditions. Laser-etched diameter markings allow quick identification of hole sizes during use. 

FEATURES:

• 12-Step Design drills multiple diameters using a single bit
• 6mm–39mm Diameter Range for versatile applications
• Split-Point Tip enables easy starting without center punching
• CNC-Ground Spiral Flute for optimized chip removal
• Reduced Vibration for smoother drilling operation
• Axial and Radial Relief Grinding for superior cutting smoothness
• High-Speed Steel (HSS) Construction for long service life
• Laser-Marked Diameter Indicators for easy size identification
• 3-Flat Shank provides high torque transmission and prevents slipping
• Suitable for Rotary Drills and Drill Drivers

SUITABLE MATERIALS:

• Metal pipes and profiles
• Non-ferrous metals
• Aluminum
• Plastics
• Composite and sandwich materials

Ideal for electricians, metal fabricators, HVAC technicians, maintenance personnel, installers, and professionals requiring fast, accurate, and versatile hole enlargement in thin materials.