Unique patented interlocking rail and drawer system that prevents shifting off the rails. Molded stops on drawers prevent drawer from pushing through the back of cart. Each drawer can hold up to 3 lbs. Cart has six casters (three locking) and middle leg supports for added stability. Inside bottom dimensions of tapered standing drawer: 13-3/8 in. L x 9-3/8 in. W x 2-5/8 in. H. Dimensions of unit: 15-1/2 in. L x 25-1/2 in. W x 38 in. H.