Glastar Coarse Grinder BitsCoarse grit in 1" width. Enjoy the smooth grinding experience that these premium quality bits provide. The solid brass substrate absorbs shock while grinding, keeping vibration and noise as minimal as possible while providing the fast material removal of grit with minimal chipping. Glastar's patented electroplating prevents the diamond grinding surface from flaking off over time, creating a long lasting bit. These bits will fit most brands of standard