Versatile sound. The Vic Firth American Custom Keyboard Very Hard Head Round mallets are designed for use on a range of percusion instruments. The mallet head is wrapped with a harder finished material to produce a stronger percussive effect. 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 a range of percussion instruments.