Straight grinders Grinding Stone Diameters of 8 - 50 mm Grinding Stone Diameters of 27 - 50 mm Grinding Stone Diameters of 40 - 50 mm Grinding Disc Diameters of 50 - 125 mm Grinding Disc Diameters of 125 - 180 mm Angle grinders Grinding Disc Diameters of 100 - 180 mm Grinding Disc Diameters of 180 - 230 mm Grinding Disc Diameters of 230 - 300 mm