... clamps can hold the workpieces tightly.8.Tank wall is stainless steel in case of being rusty ... materials is optional.Applicable Industries:Tombstone,menument,grave stone,headstone, advertisement, home&outdoor products making,mould ... industry, architectural decoration,etc.Applicable Materials:Marble,Granite,artificial stone, ceramic tile, terrazzo, limestone, sandstone, travertine, quartzite ...