MyBinding GBC CombBind C20 is a binding system capable of binding up to 20 sheets of paper (20 Ib/80 gsm) at a time. It features a color-coded guide for measuring documents and selecting the appropriate comb size, as well as an adjustable edge guide for selecting paper/cover size. The device also has a gravity-fed paper count method for increased productivity, allowing users to punch up to 20 sheets at a time. With its easy-to-use design and efficient features, the MyBinding GBC CombBind C20 is a great choice for binding documents at home, school, or the office.