Design – The JET Creepers offer an ergonomic design with a large working area, and with lengths ranging from 37" - 42", offer increased mobility and comfortComfort – The low-profile design of products 355102, 355112, and 355132 allow users to get under lower vehicles without having to hoist big trucks, while the wide-frame shoulder cut-out design provides greater comfort and flexibility of movementCapacity – Choose from either 300-lb or 400-lb weight capacity, evenly distributed across a larger area of the frame for maximum strength and durabilitySwivel Casters – The creepers include 6 professional-grade, polypropylene swivel casters for smooth and easy rollingEasy to Clean - The frames of the creepers are protected from corrosion with a glossy black powder-coat finish, while the upholstery is resistant to most shop chemicals, making it very easy to cleanLarge double post casters