... high quality 3,large gear polisher 4,for concrete,terrazzo,epoxy grinder and polisher is not only grinding and polishing concrete, marble,granite, ... , but also for repairing, grinding, polishing, crystallizing millstones.grinder and polisher HWG 70 has the quickest motor speed, from 300 rpm ... 65DB Packing 1000*900*700mm The rotation way of grinder and polisher HWG 70: The diamond tools to be chosen: ...