Grip-Rite GRA1138 Hammer Tacker 3/8-Inch by 18 Gauge 3/8-Inch Crown Galvanized Staple (5,000 per Box) Perfect for insulation, house wrap, vapor barriers and roofing felt applications Electro-galvanized, adhesive collated Designed for use in all Rapid-11 / Arrow T50 style hammer tackers 5,000 count 3/8" leg x 3/8" crown Electro-galvanized, adhesive collated Handy Reclosable Cardboard Box 5000 Staples per Box 20 Boxes per Case