The Meinl Cone-Stack is a four-chambered shaker with some wild characteristics. Two balanced chambers are connected with a center screw, and may be played as a pair, or as one shaker. As a pair, they have a high and a low side, plus an open bell, also tuned high and low. They can be played like maracas. Screw them together, and you get a kind of multi-chambered stereo effect. It's a great, full sound with metallic overtones. You can play it sort of like a shekere, or wah-wah the open bell chambers, or clasp it in the middle balance point for fine shaker techniques.