Gotoh Large Locking Schaller-style Knob Chrome Tuners (3 per side) These super tuners are recognized as such around the world The SG381 feature a 16:1 gear ratio and has evolved through improvement without compromise at any stage and come equipped with a considerable application of high-technology as standard With the improvement of precision fitting gears, marvelous touch on playing---they have gained a considerable reputation and are trusted as the No.1 machine head by many musicians all over the world These come with a metal keystone head and are perfect for your three-on-a-side setup Mounting hardware included.