Tool and cutter grinding wheels sharpen and repair cutting tools such as reamers, drills, and end mills. Straight cup grinding wheels have a wide face for precision grinding and moderate to heavy stock removal. Flaring cup grinding wheels have angled edges and a narrow face used for grinding. Dish grinding wheels have a rounded rim for surface grinding and sharpening cutting tools. Diamond and cubic boron nitride (CBN) grinding wheels are superabrasives bonded to metal to produce a durable, long-lasting abrasive.