uxcell Metal 200 Degree Wide Angle Front Viewer Peephole 1 3/8''-2'' Door Thickness High quality optical lens with 200-degree visual angel offers a crystal clear view with an extraordinary wide angle coverage. You can easily view the entire surrounding area from the top of the head to the feet of someone standing outside. Durable metal with super simple installation. It offers the highest quality security for you and your family. With the cover in place, visitors outside cannot see through the viewer into your home, offering the highest level of privacy for your protection and safety! Suitable for 1 3/8"-2 thick doors, simply drill a suitably positioned 0.61" diameter hole, insert the viewer into the hole then screw the two sides together and tighten by hand.