The Grover Sta-Tite U98-18 series tuning machines provide precision tuning for your ukulele. You'll appreciate the classic styling and smooth 18:1 gear ratio, allowing you to dial in the perfect pitch. Mounted on a durable die-cast plate, these open-gear machine heads feature a 22/64" post hole and 25.2 mm post length, compatible with most ukuleles. With a maximum string gauge of .074", these tuners handle medium and light ukulele strings with ease. Replacing your stock tuners with the Grover Sta-Tite U98-18 series gives you smooth, accurate tuning and vintage-inspired looks. Experience the difference in your ukulele's tone and playability for yourself.