BFL13 wrote:
Good job on the furnace!
Never heard of those called "square drive" before. Weird! :)
Looking it up, found this explanation;
https://www.popularwoodworking.com/questions-and-answers/q-a-square-drive-vs-phillips-head-screws/
Are you serious? Square Drives/screws have been utilized in the RV industry for over 50 years. The actual Square drive bit I use for that limit switch is No 1. Doug
PS, in a pinch you can use a small needlenose Vise Grip pliers. Hard to do, but they usually grip the outer round part of the screw.
