Have you ever sat down to work on your car and realized too late that your wimpy little roller seat wasn't up to the task. Well, now you can sit in confidence with the dependable heavy duty screw post rolling seat. Built of heavy-duty 1 in steel tubing coated with a stylish black powder coat finish, this rolling stool is strong enough to hold up to 300 lb without collapsing. Comfy vinyl-covered padded seat adjusts to fit your needs, raising from 16 to 21 in with a simple twist. The heavy-duty precision 3 in swivel casters roll without a hitch, letting you maneuver with ease. Powerbuilt rolling seats. Innovative, affordable and built to last.