Elegance and Lightness for the Schaller Bass Age.Experience the lighter side of heavy duty. M4 (Light) legendary Schaller quality now at a stunning 40% less weight. M4 specs, looks and superior performance define this tuner as a true no-compromise where weight reduction is essential.A special female screw guarantees precise positioning and fixing of the shaft.High gear ratio of 1:20 ensures a very precise tuning.All sealed tuners are lubricated with Schaller special grease for lifetime maintenance-free service.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.Technical Specification:Gear ratio 1:20, weight 44g per piece, 14mm bore diameter.