BOSCH cobalt drill bits are specially designed for drilling in hard steel. Thick web helix delivers fast material removal combined with increased durability for maximum efficiency and performance. Each bit is manufactured to exacting specifications and features a split point that starts on contact with no walking or skating, eliminating the need for a center punch.
From the Manufacturer
Bosch cobalt drill bits offer the best heat resistance and rigid thick web design for drilling in extremely hard and abrasive materials such as treated stainless steel (precipitation-hardened), cast iron and titanium.
Withstands high-temperature applications for extended periods of time (up to 1,100 degreeF)
Rigid, thick web design adds stability to bit in tough applications
Surface hardened to penetrate tough abrasive materials
Available in jobber length, full shank
Best used for drilling into light-gauge metal, high-carbon steel, aluminum and ally steel, cast iron, stainless steel and titanium