Perforated square holes are often used as grills as they have a greater open area. This is the reason you see many speaker grills made with perforated square holes, the perforated screens allow sound to pass through while protecting the speaker from damage. Square holes are also used as machine guards and applications requiring a high open area.
Material: stainless steel plate, low carbon steel plate, brass plate, aluminum plate, nickel plate and kinds of nonmetal plates.
Features
1.can be formed easily 2.can be paint or polished 3.easy installation 4.attractive appearance 5.wide range of thicknesses available 6.largest selection of hole size patterns and configurations 7.uniform sound abatement 8.light weight 9.durable 10.superior abrasion resistance 11.accuracy of size