Rebound 5A is ProMark's most robust product. A revolutionary heat-tempering technique called FireGrain turns common hickory drumsticks into precise tools with unmatched durability. Drummers may naturally hit harder and play for longer periods of time with ProMark FireGrain sticks because they maintain their original weight and balance. Natural hickory that has been hardened by flame—no extra vibration, no space tech tricks. Packaging and stick artwork may change for a brief time.