InstaCart file cart assembles in seconds & requires no tools. Open top area accommodates letter-size, hanging file folders. Bottom shelf is open for stacking paper & supplies. 15-1/2" deep sturdy file cart is made of durable steel & wire construction. Use the pull handle on each end & four swivel casters to move the cart easily from location to location. Two of the 2-3/4" diameter casters lock to immobilize the cart for loading & unloading.