These are height adjustable armrests that attach directly to a Columbia Medical Toilet Support. The armrest provides additional support when transferring on and off of the toilet seat. *Shown above with optional footrest. To add footrest, choose from drop-down menu above.For use with Columbia Medical Toilet Supports. To use this item on it's own, as shown in the picture, the U-Shaped Mounting Bracket (CM4001) is Required and is sold separately.