The Snap-on Flat-Oval Adjustable Creeper, No. JCW67MAX4, has a flat-oval tubing design that eliminates sharp corners, making it more comfortable for technicians. The heavy duty camo vinyl cover hides the solid plywood core with thick, high-density 80 lb foam padding. Users can easily use the convenient hinge mechanism for one-handed adjustment of height and the comfortable four-position headrest. The specially-designed casters reduce rolling resistance.