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. Handles easily adjustable in height with self-threading knob.