Fire doors are adjustable for all types of medium sized doors - left and right, wood and metal, residential and commercial, exterior/interior closers, fire doors, let the door do what it does. Use automatic closing and locking to stay quiet and safe The closing position is adjustable throughout, which can increase the buffer closing or closing speed Made of commercial grade aluminum alloy, fully automatic closing with adjustable speed, safe and reliable, protecting your door and lock. Installing or replacing an old door closer is easy, so you can be up and running in no time., Manufacturer: DMETE