A countersink drill bit is an accessory or attachment that is fixed into a drill for the purpose of enlarging a drill hole on metal and timber products such as hard boards. The drilled countersink hole enables a tapered head fastener to be level with the surface of the material by hiding the nail, screw or bolt from view. It can be attached to various tools such as drills, drill presses, lathes and milling machines. A Countersink drill bits
cuts a tapered surface hole that has a smaller center hole that goes through the product. They also remove raised edges that remain after drilling or tapping and help to improve product finishing and remove sharp edges that could be hazardous. There are several styles of countersink drill bits, including tip style, flute style and shank style bits. Countersink drill bits can be made from various materials such as stainless steel, carbon steel, carbide tipped and high-speed steel.Get a wide assortment of drill and countersink drill bits from MRO Supply. We stock a large range of tools and products for industrial, commercial and office use.