GBC ProClick The Do-It-Yourself Presentation Kit, includes 5/16" Diameter Spines, Paper, Covers, 2 Kits per Pack (2515665) CONVENIENT DO-IT-YOURSELF KIT  Cut out the expensive binding machine and fancy hole-punch and skip right to binding with this easy-to-use, do-it-yourself kit. It's ideal for corporate offices. FULLY PUNCHED & PREPARED  Complete kit comes fully prepared for use: 2 black 5/16 ProClick binding spines, 4 pre-punched covers (2 clear fronts, 2 black backs) and 50 sheets of pre-punched paper. 40-SHEET BINDING CAPACITY  Each 5/16 diameter spine securely binds up to 40 sheets. Neat, black spines are perfect for smaller projects. Kit creates 2 bound documents. Excellent for classroom use. PROFESSIONAL PROCLICK  Convenient ProClick bindings are the only ones that allow users to open and edit the contents without a machine. Sturdy spines zip open and closed, allowing you easy access. COMPLETELY COMPATIBLE  While ProClick spines are compatible with ProClick binding machines, this convenient kit allows for easy binding and editing without the need for a machine.