Bosch HSS Step Drill Bit 4-20mm

Performs smooth, burr-free drilling in several diameters. Ideal for deburring, drilling round holes and enlarging existing ones. Pre-punching not necessary due to its split-point tip. CNC spiral flute enables optimised chip removal and less vibration for even drilling. 3-flat shank prevents slipping in the chuck and provides a powerful high torque transmission. Offers longer lifetime when used with coolant. Suitable for use on thin materials, such as non-ferrous metals, sheet plastic, sheet steel, plastic and stainless steel.