Grover 502N ROTO-GRIP Locking Rotomatics Guitar Tuners, Tuning Machines Set 3+3 18:1 Nickel Tuning Keys with Tonebird Dunlop Polish Cloth Bundle Tuner Heads with Kidney Button

Opt for Grover Roto-Grip Locking Rotomatic tuners to enjoy outstanding tuning consistency and enduring dependability. These tuners boast an accurate 18:1 gear ratio and a locking system that ensures your strings stay firmly anchored. Simply pass the string through the post hole, give it one wrap, and turn the thumb screw to secure it. Designed as a perfect upgrade for most conventional guitar tuning pegs, they include all required mounting components. For trustworthy tuning stability, equip your guitar with Grover Roto-Grip Locking Rotomatic tuners!

• Locking tuners for guitar. For 3-left/3-right pegheads only.
• Sealed-in, lubricated gears
• 18:1 gear ratio
• 25/64” post hole
• Post length to hole: 23mm
• Overall post length: 28.2mm
• Hardware included (bushings, washers, screws)
• Drop-in replacement for: 102-18 Series,102V Series, 103 Series,106 Series,109 Series,109-18 Series,135 Series (Top mounting hole will be visible),136 Series (Top mounting hole will be visible), 502 Series, 509 Series