You can also choose the wooden handled straight body files that are mostly flat or round faced.
The cutting area is not flat, but higher in the middle than on the beveled edges.
I had a stash of 6 tooth files that my Dad bought at a yard sale in the 80s for 20 bucks - what I though was a lilfetime supply at the time.
Have ever considered discussing some of the occupational physical issues one may encounter when shaping metal by hand? Each of these are to be thought of as a great starting avatar body, which you can then further customize to your own style.
Most of the catalogs I have scanned are.
Louis, took over Simmons and continued the Keen Kutter brand name.