#5 M42 Cobalt Twist Drill Bit (12-Piece)

Drill America D/ACO Cobalt Jobbber Length (Standard Length) drill bits. Drill America D/ACO cobalt drills are manufactured to National Aerospace standard 907. These drill bits display high red hardness, permitting speeds up to 30% greater than with conventional M2 high speed steel, and are especially effective in drilling tough, high tensile strength materials like stainless steel, Inconel, and titanium. The 135¡ã split point is self-centering and reduces thrust.Effective in drilling tough, high tensile strength materials like stainless steel, Inconel, and titaniumDisplay high red hardness, permitting speeds up to 30% greater than with conventional M2 high speed steelManufactured to National Aerospace standard 907135¡ã split point is self-centering and reduces thrustGold oxide is a thinner oxide surface treatment than black oxide typically used to identify cobalt steel tools, performance is similar to uncoated toolsJobbber length (standard length) drill bitsJobbber length (standard length) drill bits