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/
Thanks for the good words on the furnace.
The square drive, yeh, it is the same as the Robertson. The Robertson drive originated in Canada and most likely why it is common language there still today.
Here in the US, square drive is common. Here is one of the fastener supply places I buy all my screws from when restoring campers. They sell the bits too,
https://www.albanycountyfasteners.com/square-drive-power-bits/1050-600.htmThis is sort of like the term "Vise Grips". They were the first and as time went on and patents ran out, the name Vise Grips is still used by the trades even if they are some other brand of locking pliers... Old names, die hard. Sort of like a Crescent wrench, or other form of adjustable wrench.
John
