The Bostitch SX1838K 18GA Narrow Crown Finish Stapler is designed for the professional driving 7/32 In. narrow crown staples from 1/2 In. to 1-1/2 In. in length. Along with our other small-body finish tools, this tool is made with lightweight magnesium and has a tough new industrial design. The oil-free engine requires no maintenance and prevents stains on work surfaces, while the swivel air fitting with filtered air inlet increases maneuverability and improves engine durability.