Smartworx File CartFor letter size hanging file folders. Sliding file rails adjust to hold legal size file folders. Bottom storage shelf removes easily to add Companion File (Vertiflex™ Smartworx™ Companion File, sold separately). Durable steel and wire construction. Four twin-wheel casters, two locking. Locking top panels slide out of the way for full access to files and can be used as auxiliary work surfaces. Includes two keys. Color: Matte Gray; Caster/Glide/Wheel: Four Twin-Wheel Casters (2 Locking).