i use this in heating season and every gas furnace call.. telescoping mini mirror lookin for the cracks in the heat exchanger. and if i need to esp to show/convince the HO bring out the ol' rigid see snake
My Stanley 6-in-1, without a doubt. Phillips and flat, 1/4 and 5/16. I go through these things like a fat kid through cake, since the nut driver ends wear out pretty quickly when I use it as a drill attachment.