... brake, anti-tippers, angle-adjustable footplate.HB250LCPQ: Aluminum chair frame, flip-up and height-adjustable inclined armrest, detachable ... -tippers, angle-adjustable footplate, locking drum brake.HB253LACHQ: Aluminum frame, drop back handle, locking drum brake, flip-up ... wheel anti-tippers, angle-adjustable footplate.HB957LQ: Aluminum chair frame, flip-up and height-adjustable inclined armrest, ...