Single-sided book truck is ideal to use against a wall or desk. 12" deep shelves are ideal for storage or transport of large books, binders or files on its two slanted shelves. The distance between the shelves is 13". Sound damping materials are applied to the underside of shelves to reduce vibration noise. 5" casters (two with locking brakes) make it easier to cross thresholds and to transport heavy loads. Welded construction provides maximum strength and durability, and 5" casters are load rated at 125 lb. each. Durable all-steel construction contains recycled material.