21 Gauge 1/2" crown upholstery staples in 1/2" length, compatible with Fasco/80 series staples Suitable for Outdoor Use: The corrosion-resistant properties of 304 stainless steel make these staples suitable for outdoor use. They're perfect for outdoor furniture upholstery, but not for boating or marine environment 10,000 Pieces per box Ideal for upholstery projects and light-duty woodworking applications, such as fasten fabric, leather, or vinyl to furniture frames, attach thin pieces of wood in homemade crafts or reupholstering small furniture items Compatible with a variety of 21 gauge 1/2" crown staplers, both manual, electric and pneumatic tools, such as meite MT8016 (ASIN B013LLGY2C), MT8016S, MT8016LN, 8016B, 8016BL, BeA 380/16-420, 380/16-429, 380/14-450, 380/25-559 staplers