Bosch cobalt drill bits are specially designed for drilling in hard steel. The thick web helix delivers fast material removal combined with increased durability, and a split point starts the bit on contact with no walking or skating - which eliminates the need for a center punch.

• Withstands high-temperature applications for extended periods of time (up to 1,100 deg F)
• Rigid, thick web design adds stability to the bit in tough applications
• Split point tip starts on contact - no walking or skating, no center punch needed
• Surface hardened to penetrate tough abrasive materials
• Jobber length with a full shank
• Best used for drilling into light-gauge metal, high-carbon steel, aluminum and alloy steel, cast iron, stainless steel, and titanium

Tip: Run cobalt bits slow with steady pressure and cutting oil on metal. High RPM and dry cutting burn the cutting edge and shorten bit life - the cobalt is built to survive heat, not to be run hot on purpose.