Deltana, S44R4HD, Plain Bearing,Flat Black, Door Hinge, 4 x 4 Steel Collection Deltana 1/4 Radius Corner 4 x 4 Steel Plain Bearing Mortise Hinge - PairLook no further for your dependable, heavy duty, quality, steel hinge. Deltana hinges provide you with the durable aesthetics you need to make your business or home the best place possible. Features:Sold as PairPlain Bearing HingeResidential StrengthRemovable Pin: YesWood and Machine Screws Included1/4 Radius CornersTraditional / Classic ThemeZig Zag Hole PatternPlain Bearing Hinge: Plain bearing hinges feature knuckles that are machined to a smooth surface, allowing them to move against one another without bearings. Plain bearing hinges are not recommended for heavy use on high traffic entrance ways, but meet the need of a standard residential door. Material - Steel: Steel is cheap strong and durable making it a favorite for hinges of all types. Though it is more prone to rusting than solid brass or stainless steel.Mounting: The standard corners for mortised door hinges are 1/4 radius, 5/8 radius and square corner. It is recommended that three hinges be used on doors up to and including 7.5 feet with one additional hinge for each additional 2.5 feet. Make sure you check your current hinges before making a purchase.Specifications:4 Inch Height4 Inch WidthMade from SteelMount: MortiseGauge: 0.128 (Thickness of Hinge Steel)5 Knuckles8 Screw holesDeltana is the architectural hardware manufacturer with a proven record for exceptional service and quality. Deltana inventories the countryÂs largest selection of architectural, lighting, and door hardware in over nine fine finishes made from solid brass, zinc, aluminum, steel and stainless steel.