old thread.... but go into any leather workshop and you’re going to see one of these. My Grandfather, and two cousins....and my brother all had shoe repair shops. They had one of these to cut the shoe soul leathers .
Leather shoe souls come in sheets and are about 1/4” thick. Have to be able to make that 180 degree turn at the toe tip and then cut back towards heal. I agree with Phill. It’s for leather. But, it’s great for cutting cork gaskets too.