United Abrasives vitrified grinding mounted points are made from aluminum oxide grain.  Use for deburring and finishing ferrous metals such as iron, steel and welds.  These mounted points are a low cost alternative to carbide burrs and are dressed for perfect balance to perform without vibration or run-out.  Provides fast stock removal for deburring and finishing.   Type "B" is designed for light deburring applications.  7/16" diameter, 11/16" length, and 1/8" shank.  For die grinders.