Architectural door hinges full mortise 3 holes per side - plain joint - stock standard weight steel inch f series - f179 class prime coated size 3-1/2 inch by 3-1/2 inches box of 2 packed with 12 each wood screws and machine screws Standard grade, five knuckle architectural hinge used commonly on light-duty, low-frequency internal or external door applications in commercial and residential buildings, such as hospitals, churches, schools, airports, hotels, malls, apartment houses, office buildings, etc. Equipped with easily seated non-rising pin, Templated screw-holes. Patterns for use on wood or hollow metal. Prime coated, plated and polished for a fine, durable. Exceeds ANSI standards, meets ANSI a8133. Each 3-1/2 inch by 3-1/2 inch hinge includes 6 -10-24 by 1/2 inch machine and 6 -10 by 1 inch wood screws.