Kluson? 3 On A Plate Supreme Series Tuning MachinesThe Kluson? Supreme series tuning machines have an 18:1 gear ratio in the traditional stamped steel housing. This particular set is designed for instruments using a plate mounted 3 3 tuning machine set with an upgraded gear ratio to original machines.The housing bears the series name "SUPREME" in place of the original "DELUXE" moniker but this is the only hint to what lies hidden under the dust cover. Using all vintage specs these tuning machines will drop right into your instrument using vintage 3 per plate tuning machines with no modifications. The smooth and reliable performance of the Supreme Series outshines the rest in its class. This is a complete set and comes with left and right side machines with hardware needed for installation.