Castanets from Black Swamp Percussion are machined in-house to ensure total control over quality. The design of the castanet shape, handle assembly and mounting style allows for a comfortable performance at every dynamic, with very little adjustment necessary. The micro-adjust tension knob also allows you to fine tune the castanet's response quickly, even in the middle of a performance. Plus, you can still play on your knee or in the air for added projection and visual distinction!