Swingline GBC 27170 CombBind C800pro Binding System, Binds 500, 18 1/2 x 19 5/16 x 14 7/8, Gray 500-SHEET BINDING CAPACITY  Professional-grade system is a binding powerhouse, designed for heavy commercial use. Ideal for use in professional print shops. Binds up to 500 sheets. 25-SHEET PUNCH CAPACITY  Electric punch pierces through up to 25 sheets. Handy punch is easy to use, powered by a convenient foot pedal for hands-free use. CONVENIENT COMBBIND  The CombBind spine design allows pages to lie flat for easy reading. The professional-looking binding is an excellent choice for presentations and group projects. ADJUSTABLE PINS  Powerful punch is uniquely designed with adjustable pins, punching up to 21 holes over a span of 12 length. Adjustable punch depth accommodates different paper thicknesses. HANDY SIZE GUIDE  Convenient size guide imprinted on the machine itself, allowing you to easily determine the correct spine size for your project. Edge guide helps ensure proper alignment. BUILT TO LAST  GBC stands behind this high-quality binding system with a limited one-year warranty. ACCESSORIES AVAILABLE  Designed to work with CombBind Binding Spines (sold separately). Neat binding spines are suitable for use in all presentations.