What is this electrical tool?
Very late answer: it's a &quot;pot twiddler&quot; for adjusting trimmer potentiometers (variable resistors) and capacitors. It's plastic so as to be non-conductive and fairly low capacitance, &quot;wire holders&quot; etc. are usually aluminium to withstand heat but not be solderable.
Some of the &quot;high end&quot; ones, e.g. made by Bourns, have a small piece of brass shim as the screwdriver tip to make it last longer... I've got one somewhere which must be 30+ years old. There are comparable tools for getting inside inductors, but these are much less important than they used to be in the days of superhet radios.