Fire doors adjustable for all types of medium doors - left and right doors, wood and metal doors, residential and commercial doors, external/internal door closers, fire doors. Let the door do its job. Use auto close and lock to keep quiet and safe Features: The door close is fully adjustable, can increase the buffer closing or closing speed Made of commercial grade Metal, fully automatic closes, adjustable speed, safe and reliable, protects your door and lock. Installing or replacing old door closers is easy, so you can get up and running immediately., Manufacturer: Akfldms