This zinc alloy door closer automatically closes your door quietly. Its adjustable speed allows you to control the closing speed. Easy to install, it's suitable for wooden, metal, residential, commercial, fire doors, hotels, apartments, apartment buildings, and warehouses. Features 1. Made of zinc alloy. It can automatically close your door quietly. 2. Adjustable speed, you can control the closing speed at will. 3. Easy to install. 4. Wide application range, automatic door closers are suitable for wooden doors, metal doors, residential and commercial doors, fire doors, hotels, apartments, apartment buildings, warehouses. Specifications: Product Name: Door Closer Material: Zinc Alloy Package Included: 1x Door Closer