... the original manufactory. Perforated metal sheet indicate to punch same type holes on one material, so as to ... steel plate, galvanized plate, PVC cold rolled plate, etc.Hole Pattern: Rectangular, Square, Diamond, Round, Hexagon, Cross-shaped ... Triangular, Oblong, O-waist, Wintersweet hole, fish scale, design shape, pertacle hole, random hole, bulge hole, etc.Characteristics: the surface is smooth ...