Stanley Hardware S745-749 CD1700 Air-Controlled Door Closer in Black Coated 1 pack Heavy duty storm and solid door closer designed for use in out swing wood or metal doors up to 1-3/4 inch thick Torsion bar and large air controlled 1-1/2 inch tube combine to provide twice the latching power of a standard duty closer Fully adjustable door closing speed and permanently lubricated to extend operating life