small WIREMOLD screwdriver

This screwdriver is 5-3/4" long and is branded with the (R) trademarks for WIREMOLD and PLUGMOLD surface mounted electrical conduit and raceway products on either side of its black plastic handle. I don't believe it is all that old, both products and more are still currently and widely available as produced by Legrand.

https://www.legrand.us/wiremold

While not a particularly unique size, this driver perfectly fits the small slotted machine screws that are (were?) used to fasten WIREMOLD parts together. I haven't actually bought or used any recently, so it is quite possible they now come with different screws.