Steel Collection Deltana 1/4" Radius Corner 3.5" x 3.5" Steel Plain Bearing Mortise Hinge - Pair Look 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 Pair Plain Bearing Hinge Heavy Duty Strength Removable Pin: Yes Wood Screws Included 1/4" Radius Corners Traditional / Classic Theme Arc Hole Pattern Plain 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: 3.5 Inch Height 3.5 Inch Width Made from Steel Mount: Mortise Gauge: 0.119" (Thickness of Hinge Steel) 5 Knuckles 6 Screw holes Deltana is the architectural hardware manufacturer with a proven record for exceptional service and quality. Deltana inventories the countrys largest selection of architectural, lighting, and door hardware in over nine fine finishes made from solid brass, zinc, aluminum, steel and stainless steel.