300C Series Heavy Duty Super Cobalt Steel Type J Jobber Length Drill Bit, Gold Oxide Finish, Round Shank, Spiral Flute, 135 Degrees Split Point, "T" Size (Pack of 6)

Michigan Drill heavy duty type J jobber length drill bit displays higher red hardness and are especially effective in drilling hard or abrasive materials. Cobalt steel tools are similar to high-speed steel, but with more cobalt for improved performance when cutting harder metals such as stainless steel or nickel alloys. Gold oxide is a thinner oxide surface treatment than black oxide typically used to identify cobalt steel tools; performance is similar to uncoated tools. Round shanks allow use with a wide variety of toolholding systems. When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging.

• Cobalt steel tools are similar to high-speed steel, but with more cobalt for improved performance when cutting harder metals such as stainless steel or nickel alloys
• Gold oxide is a thinner oxide surface treatment than black oxide typically used to identify cobalt steel tools; performance is similar to uncoated tools
• Round shanks allow use with a wide variety of toolholding systems
• When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging
• Cobalt drills display higher red hardness and are especially effective in drilling hard or abrasive materials