Ols rasps have an uneven tooth structure.
This is much better than the modern ones that tend to stay in the same ruts and give a very uneven surface.
Bacho still makes a few tools in Sweden, rasps being one kind.
Well made, good quality steel, very sharp. Flat, half round and round.
Great for shaping guitar necks.
But unfortunately the tooth pattern is very even. You have to rasp at different angle at every stroke.
Ola