Product Summary-8" casters with soft-grip tires are ideal for indoor and outdoor use.-Soft padded oversized seat.-Comes with large 21" (W) x 6" (H) x 9" (D) basket that can be mounted under seat.-Tool-free removable padded backrest for comfort.-Special loop lock made of internal aluminum casting operates easily and ensures safety. (Figure A)-Handles easily adjustable in height with self-threading knob.