The Kluson 3 On A Plate Deluxe Series has a 15:1 gear ratio for rock-solid tuning stability. These machine heads are a drop-in upgrade for your vintage guitar while providing modern tuning accuracy. The oval plastic buttons and nickel housing recreate the iconic styling of the era, ready to give your ax a period-perfect appearance. The engineering provides almost twice the tuning precision of the original Klusons so you can play in tune through even the most intricate leads and pitch-perfect chord changes. No more fretting about strings slipping out of tune mid-song. With a turn of these stable, smooth-feeling tuners, your strings stay locked in. This complete set includes everything you need to outfit a vintage-style (three on each side) headstock with that era-appropriate vibe. It comes with two plates carrying three bass-side tuners and three treble-side tuners, along with mounting screws. Just remove your existing tuners, screw on the plates and insert the Deluxe Series machine heads - no major drilling or modifications needed.