Favorite Tool

Having just picked it up from the island where I left it yesterday after replacing three electrical outlets and returned it to the drawer upstairs in the bathroom where it lives, I realize that my increasingly elderly Stanley ratchet screwdriver with the switchable bits is probably my favorite tool. If I have some project that needs to be done, it's the most likely to be recruited from its drawer for the purpose and the most likely to actually get the job done, despite -- or perhaps because -- I've had it for thirty years or thereabouts.

I presume you have favorite tools too. :)