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. Two-Prong Base. Fastener Subtype: Two-Prong Base; Fastener Capacity [Nom]: 1"; Fastener Sheet Capacity: 100 Sheets; Center To Center: 2.75".