The brass peephole is an important security feature that offers a clear 220-degree all-around view, allowing you to see who is at the door before opening it. Its modern design complements a variety of door styles and interior design styles. This peephole features a 360-degree rotating cover for optimal privacy. Technical Specifications: Material: Solid brass; Viewing angle: 220 degrees; Hole diameter: 16 mm; Door thickness: 35 to 50 mm. Installation: Drill a 16 mm diameter hole in the door. Insert the peephole into the hole. Screw the two parts together and tighten by hand. It is recommended to drill halfway through the door on both sides. Use: This security peephole is ideal for various environments such as homes, offices, or hotels. Allows you to check who is at the door before opening it, thus improving the security of your area.