Durable Materials: Double action spring hinges are made of stainless steel, which is compact and durable, hard and reliable, with long service life Applications: This double action spring hinge is suitable for free door, bar door, cabinets, wardrobe doors, cupboard doors, flip down doors, etc Double Action: The double action spring hinges allow you to push a door to both ways and will provide the desired closing speed for a variety of swinging door applications Black Nickel Plated: Multi layer processing, black nickel plated surface, easy to carry. This automatic gate spring hinge has exquisite workmanship Accompanying Tool: The set includes screws and adjustment tool, you can install them depending on your needs. Easy and effortless, Manufacturer: XVDRFSD