Stockpicker Trucks combine the mobility of a cart with the versatility of a steel step ladder. Spring loaded steel step ladder holds the cart securely in place while a person is standing on the ladder. Shelves have a 2" lip turned up. 4" x 2" mold-on rubber casters two (2) rigid and two (2) swivel with wheel brakes. Blue baked-in powder-coat finish for added toughness. Aluminum construction available. FOB Shipping Point.