I make all of my slickers, folders etc, from Iron wood, it is very hard, actually sinks in water it is so heavy, it works nicely on a lathe or sander. I have yet to wear one out, some are 10+ yrs old and get used daily. You can get it from any specialty wood shop, very expensive but you don't need much. I have one peice that is about 4 inches long, I turned it in a lathe and just started making concave cuts of different sizes, some roucded and some squared off at the edges, different depths etc. So far I have not seen anything thaht beats it.