Automatic Adjustable Door Closer Aluminum Alloy Material: This automatic adjustable door closer is made of stainless chrome steel, rust-proof and durable, spring-loaded, fully automatic closing, simple and safe protection for the door and lock. Size: Approx. 15*5.3*1.8 cm, maximum door opening angle 175 degrees. Suitable for door weight 20-40 kg, door width 1000 mm (Universal design, right or left-swinging door) Function: It can protect the door from damage and reduce noise. The automatic door closer reduces force when the door closes. Closes fully automatically and is speed-adjustable, giving you a safe door closing mechanism. Easy to Install: In the middle of the wooden door or the stainless steel door frame, fix it with a screw so that it can be used. Insert the Allen key into the upper Allen screw hole and rotate it. Adjust the required force in the six adjustment holes depending on the weight of the door in use. Wide Application: Ideal for home use, light office, shed, ranch, and home office. Also very suitable for wooden doors and aluminum doors in hotel rooms, indoor and outdoor areas. Note: All data are manual measurements, please allow 1-3cm error; due to light and display differences, there will be some color difference, subject to the physical object received. Your satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately, and we will give you the best solution!