Note:    (1) Annually check for smooth operation and ensure the lever freely 
                returns to the horizontal position. Ensure all fixings remain tight.
             (2) Check that all fixings are tight (this may mean removing the snap on
                covers of roses) and that the levers are properly aligned each side of
                the door. Make sure the levers are firmly seated in the rose plate.
             (3) All measurements are in (mm) millimeter.