Screwdriver Centering Bushing

Do you hate trying to keep a drill centered on straight slot screws? Have you ever slipped off the screw while using a drill and scratched a switch plate cover? Me too! I designed this bushing to make it easier to remove switchcover faceplate screws, but it can be used on any similarly domed straight slot screws. This was designed around a McMaster-Carr 3/16" slotted bit (item 5944A34), but it works with similarly-sized other brands as well. The clearances are tight enough that if you press