I install peepholes in any type of door and have been in business for about 5 years now. I started installing peepholes when we had a close encounter with some intruders trying to break in our home while my wife was alone inside. She went to open our front door when she heard someone trying to turn the handle and decided to check the peephole before unlocking it. To much surprise she saw 2 men in hoods standing outside the door. It is a great investment for your family and a way you will always know who is knocking on your door. My email address is firstname.lastname@example.org or you can call/text me at 801-349-6049 to schedule an appointment. The price for the 180 degree peephole with installation is $25.