Rolling knee pads allow you to be mobile while protecting your knees. The frame is made from rugged ABS high impact plastic with pads to cushion your knees while performing your project. Perfect when doing painting, laying tile or vinyl, auto Detailing, auto repair & maintenance, landscaping, and more. Includes a conveniently placed built-in tray and Holder to keep your tools and parts handy. Diameter non-marring swivel casters for easy maneuverability. Allows movement from side to side making tiling comfortable and easy. Minimize discomfort, back pain, or knee stress.