This video shows the steps to replace a residential interior door handle.
Replacing an interior door handle or knob in your house is one of the easiest and noticeable improvements you can do. The brushed nickel door lever in this video cost around $35 and will improve the look and feel of our home.
Usually the only tools needed are a Philips screwdriver or a Flathead screwdriver. A nice all in one screwdriver like this http://amzn.to/1O2tU38 will work too.