This is a double headed shamanic rattle that is 8-10 inches in length. It fits comfortably in your hand and is easy to control the quality of the shake you want. One of the rattle heads is a lower tone, and one a higher tone, to create an intentionally harmonic relationship. The maker tunes these by ear to give off a similar tone to a perfect fifth interval, which naturally has one of the most uplifting positive relationships tonally. This rattle gives off a soft rhythmic joyful shake, that has is both powerful and full. The volume of the rattle can be easily controlled. These rattles are perfect for ceremony and therapeutic settings.