Classic 747 FireGrain Promark's most durable Classic 747 ever. The Classic 747 drumstick is a perfect choice when you need more volume. It features our classic 5A diameter, but with added length and a thicker taper.FireGrain is a revolutionary heat-tempering process that transforms ordinary hickory drumsticks into precision tools with unprecedented durability. While keeping their original weight, balance, and attack, Promark FireGrain sticks allow drummers to hit harder and play longer, naturally. No excess vibration, no space age gimmicks, just natural hickory, hardened by flame.