OG Shape glass edge in glass thickness of 8,10,12mm. Three types: OG, 2OG, 3OG. It's mostly used for funiture glass grinding on Shape Machine liked SB_10. High sharpness makes glass quick shaping with few chips and no burn on glass edge. Configuration: one rough grinding wheel as position one and fine grinding wheel as position two (Pos.1 80# + Pos.2 240#),together with BK and BD to have a fine polishing performance as transparence and gloss reflection. Cause: It's highly required two diamond grinding wheels made from one factory,otherwise,will causes different shape and edge with chips.