Enhance your bass guitar's performance with the Hipshot USA Ultralite Tuning Machine Set. Crafted from solid machined aircraft-grade aluminum, these bass tuners offer exceptional durability in a lightweight package. Designed to combat "neck dive" and improve ruggedness and accuracy, these tuners feature a tiny footprint for easy installation on small headstocks. [3/8" string post fits 9/16" [14mm] headstock holes]. With a 20:1 gear ratio and a full-size gear and worm mechanism, these tuners provide super quick and accurate tuning, allowing you to spend more time playing and less time adjusting. The stainless steel key prevents tarnishing and rust where you touch most, ensuring longevity and consistent performance.