Bosch HSS Step Drill Bit 4mm x 20mm

A professional range of HSS Step Drill Bits from Bosch. Designed for use on virtually all thin materials such as non-ferrous metals, sheet steel, plastic or stainless steel.
This range of Step Drill Bits provide burr-free drilling without the need of pre-drilling. Also the spiral flute extends the Drill Bit lifetime and offers less vibration and a faster drilling rate.
Ideal for deburring and can drill or enlarge round holes of different diameter with a single Drill Bit.

High quality
Reduced vibration
Faster drilling rate
Flat shank to prevent slipping in the chuck
Available in 4-20 mm, 6-30 mm & 6-39 mm versions