Black Swamp’s Pro Concert Castanet Machine features Grenadillo wood castanets secured directly to a frame using an elastic-free design. The Grenadillo castanets are machined in-house, feature solid tone and response, and are easy to use. The adjustment knob dials in castanet tension for a confident performance at any dynamic. The base of the machine is constructed from pieces of solid ash with rubber isolating feet and an insert for mounting on a cymbal stand.