I have something like this that I managed to find at a Goodwill thrift store (of all places). It's basically the same kind of device, but looks like a screwdri

I have something like this that I managed to find at a Goodwill thrift store (of all places). It's basically the same kind of device, but looks like a screwdriver. The bits aren't twist drills (though you can chuck those in as well), but rather something like a shaft with a stepped channel down one edge. The whole tool was obviously made "back in the day" - completely metal. The bits store in the handle (screw-on cap - again, all metal). I love collecting and using older tools like this, if I think they'll be useful. I've got a couple of other oddities as well. One's a set of "interchangeable auger bits" - they look like flat twist drills, but wider - almost like a spade bit and an auger bit combined. Each is chucked in a special chuck, then that is chucked into your drill. Again, it was another small but useful set from Craftsman, and it works great (I've used it for both wood and HDPE cutting board material). The other weird tool - which I have yet to use - is kinda scary, and I don't know if I should even try: It's a circular saw blade meant to cut curves (!!!). It's triangular in shape, teeth on all the edges. Again, I have no idea if or how well it works. Maybe one day I'll get brave enough to try (I have used a metal cutoff blade in my circular saw - which was crazy to me, but it worked great). Both of these other weird tools I found at Goodwill as well (so maybe what I'm saying, is if you're looking for such tools, Goodwill is a good place to look).