G12510.0X4.2 Counterbore - 180°

Counterbore with 3-flutes, diameter 10.00mm with an overall length of 80mm and a flute length of 18mm and 8mm straight shank, according to DIN 373 standard to produce a counterbore with the aid of a non-drilling pilot with a diameter of 4.20mm for a pre-hole tapping diameter M5, HSS with standard bright finish for machining free machining and plain carbon steel, wrought and copper or copper alloys