ACCO Premium Self-Adhesive Paper File Fasteners securely fasten your papers together. Each prong fastener is constructed of durable brown enameled steel for superior strength and durability. The coined edges are smooth and safe. The prong-to-prong size is 2 3/4 inches and have a 2-inch capacity. Easy to use: simply group papers together and using a standard 2-hole punch with a 2.75 inch center punch two holes at the top of the pages insert the fasteners and flatten the prongs. The permanent adhesive holds fasteners securely in place. Each box contains 100 fasteners.