STANDARD SIZE DOOR HINGES : Experience the reliability and quality of our 3 1/2 x 3 1/2 x 2/25 inches black door hinges, complete with 5/8" rounded corners and 6 holes. This interior door hinge includes 30 hinges and 210 screws for effortless installation. Crafted from solid iron with a sleek matte black finish, these black hinges ensure long-lasting durability. For optimal performance, we recommend using 3 hinges per interior and exterior door. UPGRADE SCREWS LENGTH : Elevate the stability of your doors with our exterior door hinges set, thoughtfully designed with 6 standard-length screws and an extra-long 2-1/5" screw. We have upgraded the standard screw length from 9#x 3/4" to 1" for an impeccable fit.