Maximum sound. The Vic Firth American Custom Keyboard Brass Mallets For Bells are designed for use on a range of percussion instruments. The mallet head is made from brass producing a solid sound for use on bells and a bell tree. With a birch shaft you can expect rigidity and a solid consistent feel. Perfect if you want the extra reach without the flexibility of rattan. With a 16 length these Vic Firth American Custom Keyboard mallets were designed for use on bells and bell trees.