21 Pc. Cobalt Alloy Steel High Speed Steel Drill Bit Set
Constructed of M-42 5 percent cobalt high speed steel for super abrasive resistance in tough metals Heavy duty spiral flute design produces faster chip ejection Shorter cutting lips reduce torque for drilling in high tensile strength materials 135-degree split point reduces feed pressure for easier penetration without work hardening Irwin Hanson 63221 21 Pc. Cobalt Alloy Steel High Speed Steel Drill Bit Set by National Tool Warehouse. Add to Favorite Sellers. Cobalt Alloy Steel High Speed Steel Drill Bit Set.