Richelieu 42822-B 4 Inch x 4 Inch Ball Bearing 1/4 Inch Radius Corner Mortise Door Hinge - Three Hinges Brushed Nickel Door

Richelieu 42822-B 4 Inch x 4 Inch Ball Bearing 1/4 Inch Radius Corner Mortise Door Hinge - Three Hinges Features:Includes three hinges (3) in each orderFeatures precisely machined 1/4" radius corners Tested for residential and commercial strength applicationPackaged with 8 wood screws and 8 machine screws for simple, out of the box installationConstructed with 8 screw holes in an arc arrangement for maximum mounting strengthProduct Technologies:Ball Bearing Hinge: Ball bearing hinges are designed to handle the extra stress brought on by high traffic doorways. The greased bearings reduce the rotational friction extending the life of a hinge in heavy use situations. These hinges tend to be more durable than standard, or plain bearing hinges.Material Type: 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.Mortise Hinges: 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.Specifications:Height: 4"Width: 4"Material: SteelMounting Type: Mortise : 0.125"Number of Knuckles: 8Number of Screw Holes: 5 Brushed Nickel