Abstract: The present invention is a drill bit with a generally cylindrical bit body. The body of the drill bit has a starter tip region adapted to be releasably secured to a drill spindle. The starter tip comprises a diamond or diamond coated starter tip. There is a drill tip disposed at an opposite end from the starter tip and extends generally outward. The drill tip has two or more cutting edges with a surface and two or more helical grooves. Each of the cutting edges has a layer of diamond crystals on its surface.

Abstract: A metal abrasive belt is used to grind, debur, sand, cut, finish or otherwise abrade a workpiece. The metal abrasive belt includes a continuous metal belt and abrasive particles electroplated onto at least a portion of an outer surface of the continuous metal belt. The abrasive particles are electroplated by electrochemically depositing an electroplating matrix, such as a Nickel matrix, in the presence of abrasive particles, such as diamond or Cubic Boron Nitride particles. The abrasive particles can be electroplated to form selected abrasive and non-abrasive regions on the continuous metal member, for example, by masking selected regions of the continuous metal belt. One embodiment of the metal abrasive belt includes one or more perforations extending through the continuous metal belt. The perforations facilitate cooling and allow swarf to pass through the continuous metal belt while abrading a workpiece.