The Arrow Fastener T50 3/8 in. Leg x 3/8 in. Crown Galvanized Steel Staples (5,000-Pack) are designed with a divergent point that twists the staple slightly as it enters the material. These staples are compatible with T50 and HT50 staplers (staplers not included). They are perfect for both interior and exterior jobs, including roofing felt, house wrap, insulation, weather-stripping, wire mesh, and carpeting. Made from heavy-duty galvanized steel, these staples have a 3/8 in. leg length. The divergent point ensures a secure hold as the staple is inserted into the material.