Top-heaviness is gone! The use of carbon and processed aluminium results in less weight - without compromising on durability and precision. Weighs only 50% of conventional machine heads! Hexagon banjo mounting screw and center pin. A special female screw guarantees precise positioning and fixing of the shaft. All parts are precision-crafted and surface-finished, the self-locking drive ensures an even, delicate and steady tuning. All string posts are made of high-grade aluminium and fitted into the housing with utmost precision, ensuring the best possible tuning accuracy and wear resistance.