Hi folks. A friend has this group of screwdrivers, branded WCI, Frigidaire, and other brands which were part of WCI. Some have a magnetic tip in the handle. On others, the butt end of the handle has a triangle recess in it. It's too small to be where a magnet fell out.
I have a feeling I have seen some sort of adjustment screw on something (thermostat maybe?) which had a head on it looking like it would fit that socket. Can anyone identify what this was used for?