ActiveGrip is Promark's patented heat activated grip coating that's engineered to get tackier as a players hands sweat and their body temperature rises. It applies thin like a traditional lacquer adding no additional diameter or weight to the stick. Unlike most grip alternatives on the market ActiveGrip doesn't tear up players hands or cause restrictions to range of movement or technique. Length: 16'', Diameter: .565''. ActiveGrip - Heat activated grip coating that grips stronger the harder you play. The reinvented Acorn tip provides a larger sweet-spot to increase responsiveness and articulation. Rebound feel for power and speed. All Promark drumsticks are designed, engineered, and manufactured in the USA at our Texas facility to the most stringent quality controls in the industry.