GBC ProClick The Do-It-Yourself Presentation Kit, Includes 5/16" Diameter Spines, Paper, Covers, 2 Kits per Pack (2515665) Description Convenience is king with the easy-to-use ProClick Do-It-Yourself Presentation Kit. Avoid the hassle of expensive binding machines and hole punches with this simple, professional binding kit. Ideal for use in corporate offices. Kit creates two bound documents and comes fully prepared to serve your project or presentation, with 2 black 5/16?ProClick binding spines, 4 pre-punched covers (2 clear fronts, 2 black backs) and 50 sheets of pre-punched paper. 5/16?diameter black binding spines securely bind up to 40 sheets of paper each, making them an excellent choice for smaller projects. Also excellent for classroom use. Convenient ProClick bindings allow users to easily open and close bindings to rearrange contents without a machine. Sturdy spines zip open and closed, allowing easy access. While ProClick spines are compatible with ProClick binding machines (sold separately), there? no need for a machine with this handy kit, which allows binding and editing by hand.