Bosch Sharpening Stones Grinding disc (off-set) 607408 - Bosch 2608600389, Bosch offers the 2608600389 grinding disc, an off-set tool with a 150 mm diameter and a 22.23 mm bore diameter. This robust disc is designed for efficient material removal on metal surfaces. It is ideal for use in industrial and metalworking applications. Bosch 2608600389 Expert Grinding Disc 150mm Dia 22.23mm Bore For Metal