Baldwin 1045 4.5" x 4.5" NRP Square Corner HingeThe Baldwin 1045 NRP is a 4. 5" x 4. 5" Square Hinge with standard corners and a non removeable pin. This hinge has non removable hinge pins, used primarily on exterior doors (or any door that needs to be locked) that has hinges that are visible from the outside. Hinge is beveled on the inside leaf to obtain a tight fit when viewing the hinge in a closed position. 5 knuckles with 8 holes. Baldwin Hardware has a rich tradition of high quality, master