Perforated metal and alloy sheets are panels of metal with holes of varying shapes and sizes. Holes can be round, square, hexagonal, slotted, or other decorative shapes. These sheets are commonly used for fences, screens, ventilation, and decoration. Perforated metal and alloy sheets are available in a variety of metals, finishes, and dimensions. Tolerance held is the variation to the actual size of a product from the stated size.