Disc size Ø 150 x 25 x 12.7 mmDisc size II Ø 150 x 40 x 12.7 mmBasic equipment- supplied with discs of 80 and 36 grit - disc leveling block - safety guards - grinding supportsOptional equipment- abrasive grinding disc Ø 150 x 25 x 12,7 mm (hard) - abrasive sanding disc Ø 150 x 40 x 12, 7 mm (soft) Information/Description- very quiet operation - stable workpiece supports - built-in work surface illumination - mounting brackets for attaching to the floor or stand.