Fasco 11081F F1B 50-16 1/2-inch Crown 20 Gauge Duo-Fast 50 Series Upholstery Stapler, 1/4-inch to 5/8-inch Single shot stapler Accepts staples similar to Duo Fast 50 series Single length magazine 1/4-Inch to 5/8-Inch leg length staples 2-1/2-Pound