Engineered for maximum strength, providing the least interference with door functionality Features a removable pin that allows door removal without the need to take out the hinge Installation hardware supplied for quick and effortless mounting Features: Includes two (2) hinges in each order Constructed from steel for long lasting durability Designed with a removable pin allowing door removal without the need to remove the hinge Built in security tab provides additional security to door by locking hinge in place when closed Mounting hardware included for quick and easy installation Deltana offers a limited 3 year mechanical and 1 year finish manufacturer warranty Product Technologies: Mortise Hinge: Mortise door hinges mount flush with the surface of your door, providing maximum strength with the least interference with door functionality. It is recommended that three hinges be used on doors up to and including 7-1/2 feet, with one additional hinge for each additional 2-1/2 feet. Be sure to check your current hinges before making a purchase. Material - Steel: Steel is cheap, strong, and durable, making it a favorite for hinges of all types, despite it being slightly more prone to rusting than solid brass or stainless steel. Specifications: Width: 4" Height: 4" Removable Pin: Yes Material: Steel Mount Type: Mortse