The BikeMaster ultimate shop stool that works as hard as you do.; The base is 17 inches in diameter and has a five section tool tray with a thick one-piece magnetic rubber liner that separates and protects the parts It has five 3 inch heavy-duty casters mounted on individual reinforcement arms with 360 degrees of swivel action The seat cushion is 13 inches in diameter and can spin 360 degrees Seat height can be adjusted from 17.5 inches to 22 inches Features a beautiful chrome finish with a super comfortable cushion for those extra-long jobs