... , speed 300-2000rpm; Disc Diameter: 250mm*3 Vacuum port terrazzo floor grinderPerformance1, Aluminum alloy gearbox guarantee quality;2, Big motor: good ... concrete slabs;4, Removing epoxy thin-coats;5, Grinding sharp grout, mastic, flint and granite;6, Leveling and smoothing uneven surfaces ... diamond tools; Button of start, stop, adjust the inverter; .... terrazzo floor grinder