Professional Grade Quality Solid Brass 3-1/2&rdquo; x 3-1/2&rdquo; Full Mortise Square Corner Door Hinges by idh (Pair) (Bright Copper) Professional Grade Quality Made with high grade extruded solid brass Machined from extruded brass bar Made with a Heavy Duty gauge: 0.123 Engineered to high precision and tolerances Has template screw hole locations for use with wood or hollow metal doors Stainless Steel pin that provides durability and high resistance to rust Finials are threaded into the barrel at both ends High grade solid brass Phillips head screws Hand polished to assure the highest quality finish Finishes available: 11