meite MT8016 Upholstery Stapler- 21 Gauge 1/2-Inch Crown Pneumatic Fine Wire Stapler (1/4''-5/8" #MT8016) Lengthened thin muzzle design, operation more flexible and convenient Industrial-Applications Nailer, powerful nailing can save time and be high efficiency Stronger and more durable striker which make use of import ultra-durable metal; Easy operate with rubber molded handle and ergonomic gun body design Fastener: meite 21GA 1/2 Crown 80 Series 1/4''--5/8''(6mm-16mm) Length Staples