Cobalt Bit 3/16″

Bosch CO2139, 3/16 Inch Cobalt Drill Bit.
Designed for durability, high heat resistance. Hardened surface for stainless steel, cast iron, titanium, light-gauge metal and aluminum.Withstands high-temperature applications for extended periods of time. Enhanced M42 alloy material contains 8 percent Cobalt alloy that delivers 10x life vs. Standard bits. High-heat resistant bits withstand high-temperature applications for extended periods of time. Thick web-helix design provides additional stability in tough applications. Surface hardened tip penetrates tough abrasive materials.