Door hinges standard weight steel f series - f179 class oil rubbed bronze size 4-1/2 inch by 4-1/2 inch pack of 1 hinge. RPF179 Architectural Grade, 5-knuckle architectural hinge. 4-1/2 inch by 4-1/2 inch for 1-3/4 inch to 2 inch thick doors. Steel. Conforms to ANSI/BHMA standard A156.7-2003 and A156.1-2000. Common applications in commercial and residential buildings, such as hospitals, churches, schools, airports, hotels, malls, apartment houses, office buildings, etc. Square corner hinge fits doors 1-3/4 inches to 2 inches thick. Equipped with easily seated non-rising pin. Templated screw-hole patterns for use on wood or hollow metal. Include machine and wood screws.