Maximum strength specialty box holds eight 1-1/2" binders or most binder sizes up through 3". Double-bottom, triple-end, double-side construction provides 85 percent more stacking strength than basic letter/legal boxes. FastFold One Step Setup makes box assembly fast and easy. Liftoff lid locks into place for highest security storage. Top-loading design offers enough hand room for quick binder retrieval. Use reinforced hand holes for carrying or stacking. Storage box is built for heavy daily usage and maximum stackability with an 850 lb. stacking weight. Ideal for stacking without shelving. Storage box contains a high percentage of recycled material.