The CIF Tungsten Carbide Drill Bit has Monobloc. Reinforced shank 3.17mm (1/8 ") and Dia 1.8mm. . In stock from 0.3 mm to 3.17 mm
Minimum drilling speed 20,000 rpm
The smaller the diameter of the drill bit, the lower the speed will be. high
Descent speed from 1.6 to 4 m / min
Option, drill with ring on request