The eight tools and parts required to properly wire light switches are a single-pole switch, a Phillips-tip screwdriver, a standard slotted-tip screwdriver, a work light, voltage tester, a continuity tester, needle-nose pliers and wire strippers. Most switches can be wired without the help of a professional.
While the procedure is fairly easy, the Plan It DIY website recommends that homeowners contact a licensed electrician if they have any uncertainty about working with electricity or have any questions about the wiring replacement process.
If face plates or screws are missing, replacements can be picked up from any hardware store. These parts are necessary if wiring a double light switch into a single or vice-versa.