RCINDUS (10PCS) 5/16" Cobalt Drill Bit, HSS M35 Metal Drill Bits for Steel, Stainless Steel, Cast Iron, Hard Plastic and Wood

[5/16inch 10PCS] A pack containing 10 pieces 5/16-inch(Dia 7.938mm) cobalt metal drill bits comes in plastic storage case for easy storage.[Cobalt 5% HSSCO] Industry grade M35 High Speed Steel, containing 5% cobalt. The drill bits are harder than HSS and can drill hard metal such as stainless. More wear resistant, longer life.[135° Self Centering] 135° Split-point provides better automatic centering and prevents walking on the hard surface you are working on.[Wide Application] Ideal for Hardened Metal, Stainless Steel, Cast Iron, Plastic, PVC Board and Wood, etc.[High Quality] Directly operated by the factory. Real M35 material goes through more than a dozen processes, Including full grinding and hardening. Diameter accuracy is controlled within -0.03mm. We care about your satisfaction, Any problem please contact us for a full refund or replacement.