These German-made "Stickleback" drill files turn up from time to time in my neck of the woods.
|Popular Science, November 1956|
The same kind of drill was also offered by other manufacturers, like the Beaver Speed Saw drill bits advertised below (and which, unlike the Stickleback offerings, could be used on metal).
|The Family Handyman, May 1955|
The Beaver Drill & Tool Company was founded in Kansas City 60 years ago, and is still around today as a family-run industrial distributor.