SKYDIN M35 cobalt drill bit - 1pcs 16.8mm

Features: Material: M35 (including Co5%) M35 is including our 5% cobalt high speed steel, M35 contains cobalt high speed steel compared with low cost and easy processing, through the proper heat treatment, can get high hardness, high hardness and high wear resistance, toughness and bending resistance were not lower than ordinary HSS, can overcome the mold edge collapse and cracks, early damage, is the first selection of stainless steel processing.