Installing a door knocker with a peephole is almost similar to installing a knocker alone, but there are a few additional steps. First, you have to drill two holes into your door, one for the top and one for the base. Next, there will be another drill slightly bigger than the rest that is for the peephole. The placement of this drill is mostly middle or on the top of the product, depending on the product’s style. Once done, all you now have to do is screw the three holes together with the door knocker with a peephole. This is an easy DIY project if you would like to, or an expert is anyways just a call away.