Versatile: Works with medium doors of various types - wood, metal, residential, commercial, exterior/interior, fire doors, and glass doors with frame. : Features a zinc alloy shell that is oxidative, , rustless, and weatherproof for performance. Adjustable: Adjustable closing speed allows you to set slow or fast closing using the included bar. Quiet & Secure: Hydraulic operation provides quiet closing and secure latching, ing your door and lock. Easy Installation: Complete set with fixtures and installation instructions for simple mounting on any medium door., Manufacturer: KXAOXGRC