Shelf functionality has allowed users of hand trucks by Wesco Industrial Products Inc., of Lansdale, Pa., to have a traditional truck, a platform truck and a shelf truck in a single model. This feature is available on Wesco’s Cobra Jr. and Mini Cobra convertible aluminum line. Self-contained, the trucks allow for easy conversion from two-wheel to four-wheel to shelf configurations. In a four-wheel layout, the Cobra Jr. can carry up to 200 of the truck’s 650 pound total capacity. With or without carpet covering, the shelf measures 17” x 37.5”.