I order a set of Schaller machine heads but I order the wrong model so I sell this brand new set of tuners. Schaller's Keystone tuning buttons feature vintage original specs along with that classic look and feel. Designed to match contemporary as well as historic guitar styles. Double-Ring version. 6 threaded bushings, 6 step washers, 12 mounting screws. Gear ratio is 1:16, weight = 29g (Double Ring, solid 21,7) per piece. 67 €uros shipping included to Europe. 70 €uros shipping included to Worldwide. Schaller G-Series Deluxe Double Ring, made in Germany. High quality, better than Grover and Kluson IMHO.