Bing Bongs use the same popular concept as Doobies; The Cut Center Dowel concept. This means that the center rod in birch is split in a cross. The cross causes the center rod to compress and open as you play. When playing at low volumes, this dramatically increases the bounce which suddenly enables twirls with a couple of rods!
Bing Bongs consist of yellow and black alternating polypropylene rods surrounding a stronger center rod. Polypropylene reduces the overall weight of this model compared to other Bundles. Bing Bongs are very durable for those of you who take a little more when you play.