... grinding concrete floor, and stone renew and crystallization.polish machine HWG 78 has planet disc plates, counter rotate, grind and polish surface ... panel is easy to understand.Ideal for:1,Grind and polish concrete, marble, granite, terrazzo with various grit of diamond metal ... mastic with PCD tools.3,Pre-treat and level the concrete surface before epoxy coating;Parameter: Weight 240KG Extra (Iron) ...