Wilson Jones Ultra Duty Binders deliver top-notch durability, include 4 pockets and combine our strongest covers with our best ring. The extra durable hinge and custom formulated, PVC Free polypropylene covers make these binders nearly impossible to rip. The material lasts 10X longer than vinyl and is better for the environment. D-Lock never-gap rings provide increased sheet capacity and spill-free security for your papers. Plus, for extreme ease of use single-touch triggers allow you to open all 3 binder rings with just one finger. Available in a wide variety of colors, the 1/2 round ring binder can hold 120 sheets..