The Jim Casella Series IP1003 hard yarn marimba mallets are on birch handles and are designed for both indoor and outdoor percussion ensembles. The hard yarn wrapped around a rubber core creates full, bright tones that fit in perfectly with any ensemble situation. Polished birch handles are light and durable, perfect for long hours of practice or heavy-hitting performances. Hard yarn mallets are typically used for lead parts on middle and upper ranges of marimbas. Jim Casella's extensive expertise in music arrangement has contributed to the design of this well-rounded mallet series.