To save time and increase efficiency, Speedy Spine View Binder features a patent-pending channel construction that allows easy drop-in of spine inserts for custom graphics in seconds. Speedy Spine inserts load five times faster than traditional binders. No more wiggling, fighting or sweating to customize presentation binders. Clear overlays on the front, spine and back allow easy customization. Three round rings are mounted to the back cover to reduce wear and let the letter-size pages lie flat. Two, clear inside pockets provide extra storage for loose documents. 1/2" ring capacity holds approximately 125 sheets. Round ring binder also features a vinyl-covered, sturdy chipboard core and exposed rivets.