... quality 3,large gear polisher 4,for concrete,terrazzo,epoxy grinder and polisher is not only grinding and polishing concrete, ... , terrazzo, but also for repairing, grinding, polishing, crystallizing millstones.grinder and polisher HWG 70 has the quickest motor speed, from ... button, details decide everything;5,All screws are made of stainless steel.Ideal for:1, For coarse grinding, medium grinding, ...