A hole saw, found at your local hardware store is the solution. Most come in simple kits with many hole saw diameters and fit into your portable or cordless drill. Perform the following steps:
Landscaping, believe it or not, can contribute to the security of your home. Although bushes and trees can provide privacy and shade for your yard they also provide hiding places for intruders. Make sure your bushes are trimmed back away from your door, your trees are well groomed and the limbs are trimmed back away from the house. A wide-angle lens door viewer will provide you with the means to see a panoramic view of the space around the door, but trees and shrubs can hide a person who is lurking on your property. Long hanging limbs can provide access to the second story of the home. Another tip is to have a maintained yard a groomed lawn is a good indication that someone is home.
When moving to a new apartment or condo, have the doors rekeyed for extra precaution. Make sure your door has a peephole with a wide-angle lens so you can determine who is at the front door. Install locks on sliding doors and windows for added protection. Use common sense when it comes to entering and exiting your residence.
When using a door viewer make sure the person on the outside doesn't know you are inside so do not make noise while viewing the outside of your door. Make sure the outside of the door is well lit. Determine whether or not you know the guest knocking on the door. If you don't know who is visiting your home then quietly stay inside and don't answer the door. If you feel that the visitor threatens you then proceed to call law enforcement for backup.
The NuScope peephole provides a 5/8” picture of the visitor at the door and the entire outside area. This optical device is made from solid die cast metal for durability. It easily fits in doors with a standard peephole. This high tech security device is made to eliminate the need for a standard peephole.
The WideVision peephole contains an advanced prism lens, which provides a wide angle, 132-degree view of the outside. This allows you to identify people up to six feet away without having to press you eye against a small peephole. With this device it is like having a color television at your front door.