Bosch CO2159B 1/2 in. x 6 in. Cobalt M42 Drill Bit

Cobalt M42 drill bit ?C provides upgraded M42 cobalt jobber-length bits designed for durability, high heat resistance and hardened surface for stainless steel, cast iron, titanium
Enhanced M42 alloy material ?C contains 8% cobalt alloy that delivers 10x life vs. Standard bits
High-heat resistant bits ?C withstand high-temperature applications for extended periods of time
Thick web-helix design ?C provides additional stability in tough applications
Surface-hardened tip ?C penetrates tough abrasive materials

Hard-Core M42 Alloy Cobalt Drill Bits

Bosch Cobalt M42 Metal Drill Bits are engineered with an upgraded M42 alloy, containing 8% cobalt. These hard-core cobalt bits deliver 10X life vs. standard bits and are designed for high heat resistance.