Premium Mortise Mount Invisible/Concealed Hinges (1-3/4" Leaf Height) with 4 Holes (2 Hinges), Zinc Alloy, Satin Nickel Finish, 1/2" Leaf Width, 23/32" Leaf Thickness (13x45mm), Easy to Install APPEARANCE - Our QT invisible / concealed hinge is ideal when a flush, smooth surface with no visible hinge is required. APPLICATIONS - Our hinges can be used for both wood or metal applications. Our hinges are perfect for boxes and cabinets or other longer, wider applications. Our QT Hinges open a full 180 degrees and have a laminated link which ensures smooth hinge movement. This hinge has a weight load of 5 kg. ZINC ALLOY - Our hinges are made of durable zinc alloy with a beautiful satin finish. Our 3/4 Inch mounting screws are made of stainless steel. DIMENSIONS - Overall Height 1-3/4 inches, Overall Width 1-23/64 Inches, Inside Height, 3/4 Inch, Inside Width 1/2 Inch USA WARRANTY - 100% SATISFACTION GUARANTEED - Customer satisfaction is our highest priority. All of our products are protected by QT Home Decors One-Year Worry Free Warranty. You can reach our customer service Mon-Fri, 9-5PM EST, at (949)342-5229. We love hearing from you.