Spring Hinges Collection Deltana 1/4" Radius Corner 4" x 4" Steel Spring Hinge Mortise Hinge (Sold Individually) The durable steel construction brought to you by a Deltana spring hinge is not to be overlooked. The adjustable spring mechanism means you have the control you want. This is the spring hinge for you. Features: Sold Individually Spring Hinge Residential Strength Removable Pin: No Wood Screws Included 1/4" Radius Corners Traditional / Classic Theme Zig Zag Hole Pattern Spring Hinge: These single action hinges are fitted with springs in the barrel to bring an open door back to a closed position automatically. Great where door space is at a premium and door closers are impractical. With double action hinges, the door is able to move in either direction. 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 Height 4 Inch Width Made from Steel Mount: Mortise Gauge: 0.097" (Thickness of Hinge Steel) 3 Knuckles 8 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.