--The picture shows is the stirrups clamped to the metal side rails on the chair. 
-- clamp slides forwards and backwards (and off)
--The stirrup posts spin 360 degrees to move the ankles in toward the center line, and out toward the side; they also can be locked in place.
--The post that the stirrups extend from can be lifted higher or dropped lower to raise or lower the legs/feet.--And finally the ankle cups rotate to naturally arrive at the perfect position for the customer's ankles for comfort during use.
--The stirrups are made from surgical grade stainless steel and have a lifetime warranty.