Unikeep 3 Ring Binder - Clear - Case View Binder - 1.5 Inch Spine - Metal Rings - With Clear Outer Overlay - 3 Pack of Binders Round metal rings with booster  access and secure your materials with one click Clear poly overlay  repurpose your binders again and again just by swapping out a single-page insert (Also available without the overlay) Completely enclosed and durable  two snapping locks on the outside keep contents dry and dust-free on the inside Stackable and storable  the archival-safe way to transport and store your documents