MEINL Cajon Castanets are the ultimate in cajon accessories. These handy, lightweight instruments have a self-adhesive backing that sticks safely and securely to any surface. Typically mounted on the side of a cajon, the spring loaded Rubber Wood pieces create a very unique and musical accent that provides an outstanding dimension to your sound. A simple tap with the finger tips and they immediately clap together and respond with a full tone. These are especially useful for softer acoustic gigs, but have applications in the studio as well. Each of the three sizes have their own unique tone. Collect all three to complete the trio! Not only are they perfect for cajons, these castanets can be mounted anywhere on your percussion or drum kit set up for added effects.