HSS step drill can make smooth bores of various diameters with one drill
CNC ground spiral groove provides optimized chip evacuation and reduced vibration for even bores
Excellent cutting smoothness thanks to axial and radial back grinding
Made of HSS for a long service life. Laser markings for diameters.
The step drill is made of HSS (High-Speed Steel) and lasts a long time when using coolant. The hole diameters in both spiral grooves are clearly visible and permanently marked with the aid of a laser.
Features for BOSCH STEP DRILL HSS 4-20 1/4", 70.5 MM