Black&Decker KR8542K

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. The 135 degree split point tip delivers a precision start and prevents walking for fast, accurate holes. 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.

General purpose high speed steel wire gauge straight shank jobber length drill bits is constructed of M-2 high speed steel for the best combination of strength, heat resistance, and wear resistance.

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. The repla more→ceable 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.