An item to attach to the sanshin's teega (body wrap). You can also decorate your everyday sanshin a little stylishly with a teega fastener. Recommended for those who want to make their sanshin different from others. Attaching the teega fastener prevents the eyelet hardware from becoming flimsy when tying a thin teega. Also, since the knot of the string comes to the back, the overall appearance is tightened and looks neat.