HSS Cobalt Drill Bits Set M35 High Speed Steel Jobber Metal Twist Drill Bits
Professional & Widely Use: M35 HSS Cobalt 5% Jobber Drill Bits for Drilling Stainless Steel & Hard Steels. Top Heat Resistant: HPMAISON M35 HSS Cobalt Twist Drill Bits must be used and operated at 1500 RPM or greater for maximum efficiency.