Grip Rite Prime Guard Max MAXC64158 18-Gauge L type 1/4-Inch Narrow Crown by 1-1/4-Inch Leg Staples, Stainless Steel,  500 Per Pack Fits 18 Gauge 1/4-inch Crown Staplers 316 Stainless Steel 1-1/4-inch Stainless Steel 500 per pack