ACCO Premium Two-Piece Two-Prong Paper Fastener Base and Compressor Sets, 3.5" Capacity, 4.25" Center to Center, Silver, 50/Box

Original two-piece, self-locking fasteners give you a secure, book-like binding to help you save on document storage space. Sturdy fasteners in specialty sizes are great for non-standard applications. Made from heavy-gauge, high-grade material for added durability.