The spring-loaded door closer is made of carbon steel with plastic coating, burr-free, deformation-resistant, available for indoor and outdoor use. The coated steel provides long service life. This bar door closer adopts an automatic door closure design with spring, which automatically restores to the closed state via the spring. There is no need to close the door after entering, and it can reduce the force when closing the door and prevent the door from damage. The automatic door closer has an adjustable design, you can freely adjust the closing force with the included adjustment lever, which increases smoothness when closing the door. Adjustable door closer springs are simple to install. The door closer is simply mounted and tightened between the door frame, available for both left and right opening doors. When mounted in the middle, you can also operate two doors at the same time to save costs. Spring-loaded door closers are compatible with wooden doors, plastic doors, fences, etc. Compatible with left and right opening doors. 356mm total length for heavy doors, adjustable tension is available for both light and heavy doors. Colour: Black Material: carbon steel Size: 36x4cm Package Contents: 1 set * Hinge