LI96102 Features: -Bed is high quality 1/2" plywood.-Comes with four 2" ball bearing wheels.-The headrest and wheels are replaceableThis is a low profile steel creeper made for durability and performance. It may have a rugged look, but it has a smooth and easy glide. Simple to clean and great to have in any shop.. Specifications: -36" 4 Wheel Low Profile Steel Creeper. Warranty: -Lifetime warranty does not cover abuse.