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. One Touch mechanism lets you open, close and lock your binder in one easy step. Easy Insert feature helps you place and remove personalized spine inserts quickly and easily. Gap Free feature prevents ring misalignment so pages turn smoothly. 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. Wider front and back binder panels fully cover standard dividers and sheet protectors. Exposed rivets on spine.