These Tolsen AirXT pneumatic crown staples are designed for secure fastening across a variety of materials, including solid wood, plywood, insulation, and textiles. Each box contains 5000 pieces made from galvanized steel, which provides an anti-corrosive finish to help prevent rust over time. With a 18GA gauge and a length of 40 mm, these staples feature a crown width of 5.7 mm and a thickness of 1.25 mm. This specific geometry makes them suitable for upholstery and working with soft materials where a strong, stable hold is required.