Versatile compatibility: suitable for left- and right-handed doors, including wood, metal, commercial, residential, and fire doors. Complete hardware set: package includes door closer, four screws, three accessories, and installation instructions. construction: corrosion-, rustproof finish with quiet hydraulic operation for smooth closing. Adjustable force: closing speed and pressure can be easily tuned using the provided bar. s door and lock: automatic closure reduces slamming, extending the life of your door and locking mechanism., Manufacturer: KXAOXGRC