High Speed Countersink Drill Bit 3/8 in. - Black Oxide

Precision ground 82° tip for countersinking most machinable metals, wood or plastic. Made from industrial grade high speed steel for increased durability. Includes a black oxide finish for added corrosion resistance. Five flute design reduces vibration for smoother drilling and extended life. 1/4 in. round shank fits all handheld and stationary drills. These high speed steel countersinks are milled for countersinking into most machinable materials, including iron, steel, soft metals, plastic or wood. They are available in 1/2 In., 5/8 In. and 3/4 In. diameters.