MCM Wall Holder for 10″ Wide Bariatric Armboards: MCM 446. MCM’s Armboard Holder is constructed of durable and easy to clean stainless steel and will hold arm boards with the pads attached, keeping your parts nearby and out of the way. Keeps arm boards handy and clean when not in use. Will fit 10″ wide bariatric arm boards 24 or 26 inches long. Note: Standard Holder will fit 6″ wide armboard.