Promark Bob Gatzen Signature Drumstick - Balance Groove Diameter: .575" Length: 16-3/8" The notch changes the center of balance of the stick for an assisted rebound Hickory is the most popular wood choice for drumsticks due to its resilience, responsiveness, durability, and classic feel All ProMark drumsticks are designed, engineered, and manufactured in the USA at their Texas facility to some of the most stringent quality controls in the industry