Kolner KCD 12L

Milwaukee Thunderbolt Black Oxide jobber length drill bits are designed for extreme durability and long life. The Thunderbolt web features a thicker core than a standard drill bit to provide ultimate more→strength and protect against side load breakage. A specially designed parabolic flute form clears chips fast, while the 3-Flat Secure-Grip shank holds the bit firmly in the drill chuck. Effective for drilling on curved surfaces, Milwaukee Thunderbolt Black Oxide bits require less effort to drill through metal, wood and PVC and are highly recommended for use with portable drills.

Diablo's new 2-cutter Self Feed Bits are designed to strict tolerances in the heat forging manufacturing process resulting in energy efficient drilling with up to 2X life per battery charge. Diablo Se more→lf Feed Bits 2-cutter design and an aggressive low thread count feed screw deliver up to 2X more holes per charge. The replaceable feed screw features a pull out stop mechanism that prevents the screw from slipping out when the bit is removed from the material. The combined innovative engineering of Diablo Self Feed Bits makes them the ideal choice for making holes up to 2X faster in soft woods.

IRWIN Blue-Groove point and cutting edge for faster chip removal - 4x faster than standard spade bits