KGS Diamond 90 x 55 mm hand wedge. Manual wet sanding and polishing of Granite, Marble, Glass, Composites, Concrete, Terrazzo, Ceramic and Porcelain. The 90x55mm Sanding blocks are very suitable for Sanding or Polishing profiled surfaces thanks to their flexibility and can be easily bent. Grain 60 to 400 Binder Metal - Grain 500 to 3000 Binder Synthetic Resin. These Wedges allow a meticulous finish of any stone, marble and granite surface. Water or Dry use. Swiss Diamond Technology.