In the last few years this has become quite a popular fingerboard wood, mostly among electric guitar manufacturers. The devotees include Fender™, Music Man™, Peavey™, Sadowsky™, and several more. It’s likely to become even more popular in the next few years as it will probably be less expensive than Indian Rosewood, the current wood of choice for fingerboards among large manufacturers. Pau Ferro (Machaerium villosum or schleroxylon), also known as Morado, Santos Rosewood, or Bolivian Rosewood is not a true Rosewood, but it boasts many of the qualities that are highly regarded in a fingerboard wood. It’s stable, abrasion resistant, hard, attractive, exotic and has good compression strength parallel to the grain. It’s not so resinous that it can be difficult to glue like a few of the Rosewoods. From Brazil and Bolivia, supplies are adequate and no shortages are anticipated.