The masos or clubs are made from a heavy, hardwood that resembles palo sangre, Dialium, often used for fine carvings.
Batans and masos are usually seen as pairs, so I prefer selling them that way. When I find an interesting set trade for it, so I keep a few in Peru but none in the US. Their heavy so they won't go by parcel post, but by cubic-meter wooden box via ocean freighter.