This CRL Senior Adapter Block is commonly used with the Senior Prima (not Junior or Regular series), and Senior Cardiff Series of hinges. The Senior Adapter Block allows the hinge to be mounted directly into the Shower Deluxe Header Assembly and can be adjusted sideways to any position required. The Adapter Block has a clearance notch which allows it to fit under the wall bracket when the hinge is mounted close to a wall. A drilled 1/4" (6 mm) hole in the header is required for installation and the hinge base plate must be removed to mount the hinge to the header. Each Senior Adapter Block is individually packed with a screw.