RCINDUS 21PCS Cobalt Drill Bit Set 1/16"-3/8", HSS M35 Metal Drill Bits for Steel, Stainless Steel, Cast Iron, Hard Plastic and Wood

[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. [1/16-3/8in 21PCS] Set includes: 1/16(Dia 1.59mm), 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 11/64, 3/16, 13/64, 7/32, 15/64, 1/4, 17/64, 9/32, 19/64, 5/16, 21/64, 11/32, 23/64, 3/8 inch(Dia 9.525mm) metal drill bits. Comes in plastic storage case for easy storage. [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.