SPRING BUFFERSpring door closer adopts strong spring, which has strong elasticity. After the door is opened, the spring has enough power to automatically close the door. The spring buffer provides safety to some extent. ADJUSTABLE RESISTANCEThe spring door closer can use the inner hexagonal adjustment rod to adjust the closing speed and closing force. The user-friendly design allows you to find the closing speed that suits you. INSTALLATION METHOD The spring door closer is installed on a wooden door frame or an alloy door frame of aluminium. Installed in the middle of the door frame and fixed with screws to improve stability and prevent falling. HIGH QUALITY MATERIALThe spring door closer is made of stainless steel, solid and durable. Suitable for left and right doors, easy to install. WIDE RANGE OF APPLICATIONSThe spring door closer is suitable for doors in shopping malls, companies, factories, schools, hospitals and other public places. It can also be used at home. Size: refer to the size picture Quantity delivered: 1 piece