The AFF creepers allow you to maximize both productivity and comfort when working in the shop. Built with an ergonomic design, materials include heavy-duty tubular steel or HDPE plastic. Industrial-grade swivel casters deliver smooth and precise movement even over cracks or debris. Made with heavy-duty tubular steel or HDPE plastic. Includes extra shoulder and arm clearance on most models. Easy-to-clean surfaces are oil, chemical, and grease resistant. Industrial-grade swivel casters glide easily across the shop floor. Provides the clearance needed to get the job done quickly and easily.