Features:Model: 3 left + 3 rightSurface: Chrome with ebony buttonsRatio: 1 : 12Weight g/item: 45Bore mm: 9.8Specifications:M6 the gold standard. The worlds most successful tuning machine.Gear ratio 1:12.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 brass and fitted into the housing with utmost precision, ensuring the best possible tuning accuracy and wear resistance.