Product Review

Bosch CO2144 17/64" Cobalt Drill Bit. Cobalt formulation provides overall bit hardness of 66-68 HRC for penetration of very tough abrasive materials. Able to withstand very high temperature drilling applications for extended periods of time. Under high drilling temperatures bits stay sharper longer than standard HSS. Thicker web increases rigidity in hard materials. 135 degree split point starts drilling on contact. No walking or skating