This set of 2 x 2 Gotoh UK700 Ukulele Tuners have height adjustable string posts to allow you to adjust the string break angle over the nut and use the tuners with peghead thicknesses from 9 to 16 mm (0.35 to 0.63"). The tuners have a 1:15 gear ratio to offer fantastic tuning precision over friction pegs. Traditional press fit bushing fit an 8.3 mm (0.33") hole in the headstock to secure the string post.