Features and Benefits Six, 2-1/2" oil resistant wheels Fully padded for comfort while working Converts from a creeper to a seat - push pin release for easy conversion Powder coated to prevent rusting Positive locking mechanism This convertible creeper seat is 40" x 17" overall in size with the load capacity of 300lbs. It goes from a conventional, upright seat to a fully horizontal, mechanics creeper at the push of a release button. Whiteside Mfg.