Promark's most durable Rebound 5A drums sticks, FireGrain models feature a patented heat-tempering process that transforms ordinary hickory drum sticks into precision tools with unprecedented durability. While keeping their original weight and balance, Promark FireGrain drum sticks allow drummers to hit harder and play longer, naturally. No excess vibration, no space-age gimmicks. Just natural hickory hardened by flame. They are now available in a 4-pack configuration.