ACCO fastening devices and business essentials help organize all types of workspaces from cubicles to classrooms. An economical alternative to premium fasteners ACCO Economy Standard 2-Piece Prong Fasteners includes prong bases and compressors. These fasteners are available as complete sets which include both prongs and bases as well as components which are sold separately. Every little detail leads to success and even these small products help make big impressions. For use at home or in the office you can securely bind up to thick piles of paper with these low-cost fasteners. Insert flexible fastener prongs through standard two-hole punched compressor holes flatten prongs and adjust compressor s sliding rails to lock into position. They are easily adjustable as pages are added or removed. These fasteners are compatible with a wide array of paper types from tough construction to delicate handmade paper. They feature a bright tin coat finish and smooth safe edges. The prong to prong size is 2 3/4 inches and have a 2 inch capacity. For use with a standard 2-hole punch. Each box contains 50 fastener sets.