... your drawing 3.can be easily cooled Pencil edge diamond grinding wheel with internal cooling holes Special design for easily cooled.Regular ... , 2003.8169 As specified4.0100, 125, 150, 175, 2004.5169 4.5100, 125, 150, 175, 2005.0169 5.0100, 125, 150 ... , Z.BAVELLONI, INTERMAC, BENTERLER, BEIJIANG and others Pencil edge diamond grinding wheel with internal cooling holes