The PRT-952-217 s a set of 6 Ratio InvisoMatch Standard Installation Plates, designed for easy installation of Ratio Tuned Machine Heads. Match the correct plates to the current machine head screw position on your guitar. Use your guitars existing mounting screw holes for a fast, perfect Ratio installation. It has 'F' Style screw holes.
Tune-a-lele Ukuleke tuners are the worlds lightest machine heads (5g each), with a uke friendly 6:1 gear ratio! This super light, yet strong machine head makes ukes balanced, not headstock heavy, and with zero back lash makes tuning so much easier.