Package: Includes 1 x automatic door closer, 4 x screws, 2 x hex key inside, 1 x door protection plate. Premium Material: the automatic door closer is made of stainless steel, adopts an integrated molding process and a multi-channel assembly process, makes the whole product durable and sturdy. Size: This product is about 160mm x 98mm x 20mm, suitable for a door width of 1000mm. Ideal for home, office, hotel room closet door. Universal Design: Please measure your door before ordering. This product is suitable for door weight 20-40kg and door width 1000mm. You can tighten or loosen the adjustments using a hex wrench. Adjust the tension for slow or fast closing, choose your return closing speed based on the environment the door closer is placed in. Application: Ideal for home, office, closet door of hotel room. The door closer spring gives you an easy and safe life, protects your door and your lock.