High Quality MaterialThis door closer is made of high quality stainless steel and zinc alloy, which ensures its durability and corrosion resistance.These materials ensure that the Indoor Adjustable Door Closer can withstand outdoor weather conditions and maintain excellent performance during long-term use.Smooth and Seamless Door Control ExperienceOur door closer features a roller made of nylon material at the end of the arm as well as a reinforced foot, which allows the door closer to operate smoothly and effortlessly.This design not only reduces noise, but also minimizes friction and wear on the door, creating a quiet and comfortable living environment for you.ApplicationThis door closer can be used for various interior left and right opening doors, such as burglar doors, fly screen doors, wooden garden doors, wooden interior doors and aluminum alloy doors.Fantastic FunctionOur automatic door closer offers the function of automatic door closing.It effectively reduces the noise when the door closes while providing a cushioning effect to prevent damage to the door.We recommend oneSpring Tension AdjustmentAfter installation, insert the black wrench and turn it from right to left to increase the spring tension of the door closer.Insert the same wrench into the adjustment port and press down firmly to release the spring tension.(It is recommended to wear gloves during the operation to avoid injury to hands in case the wrench slips.)