One Touch� mechanism lets you open, close and lock your binder in one easy step. Gap Free� feature prevents ring misalignment so pages turn smoothly. Crystal clear overlay enhances custom inserts on front cover, back cover and spine. Nonstick, archival-safe material won't lift ink or toner off of printed pages. Locking EZD� ring holds up to 50% more than same size round rings (20% more than slant rings). Back-mounted rings allow pages to lie flat. Four inside pockets store unbound materials for improved organization. PVC-free. Maximum Capacity Range ("): 3 in; Sheet Capacity: 670; Color(s): Gray; Binder Sheet Size: 11 x 8 1/2.