Package Included: our package not only includes 4 pack of self closing door hinges, also adjustment wrenches, and mounting screws for the corresponding holes, which is convenient and quick to help you install and enough quantity can meet all your requirements Materials: these spring loaded hinges are made of heavy duty steel, which is rust proof and corrosion resistant, designed to provide durability and reliability; The steel structure ensures that the hinges can withstand high intensity use without affecting its performance Self Closing Feature: the door closer spring has built in adjustable spring tension, allowing you to control the speed and force of the automatic closing function; Adjustable tension can control the opening range of the door, and can also make the door close automatically; Let your door open a full 180 degrees, and the spring hinge helps ensure that the door consistently closes securely without the need for manual closing Easy Installation: the spring loaded door hinge comes with essential accessories such as screws and a tension adjuster simplifying the installation process without the need to purchase additional components; It can be effortlessly installed by both DIY enthusiasts and professional installers, facilitating door upgrades Wide Application: suitable for various door types Whether you want to install them on interior or exterior doors, this auto close door hinges white can be easily adjusted to get good tension; The door will close automatically, no more opening and forgetting to close Features: This spring door hinge designed to fit all kinds of door sizes for all self-closing doors, the closing force can be adjusted at any time. The spring door closer are spring-loaded. The closing force is good for doors that people forget to close. Adjustable tension makes you freely set to leave the door closed or ajar. Specifications: Material: steel Color: white Size: about 2 3/4 inches Package includes: 4 x Spring loaded hinges Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays. Small parts included, please keep them away from little kids to avoid swallowing risk.