Avery Nonstick Heavy-Duty EZD Reference View 4 Inch Black Binder (79604) 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. Easy Insert spines, back-mounted locking Gap Free rings and four inside pockets.