Contain document sets with these economy prong fasteners. Eachcoated fastener features a matte finish and smooth coined edges for safe handling. ACCO uses high-quality steel to manufacture these economy prong file fasteners, which stand up to long-term filing needs. A simple way to keep loose documents together in one spot. Width: 8. 5" prong to prong. 3. 5" capacity ensures related documents stay together. Tin coated and made of metal for durability. 50 per box. Secure documents with these ACCO 8. 5-inch-center 3. 5-inch-capacity economy prong fasteners designed for multiple filing purposes.