Assembles easily. Designed to transport oxygen, acetylene, nitrogen and other gas cylinder tanks safely. A Folding Rear Support features a spring-loaded lock mechanism to easily convert the truck from 2-wheel to 4-wheel mode for added stability. Cylinder Truck is constructed of welded tubular steel for durability, and includes a safety chain to help secure the cylinders. Rolls smoothly on 8" mold-on rubber wheels, and the 4-wheel position offers 3" swivel casters for easy maneuvering., Lot of 1