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Main image of Grover 502C ROTO-GRIP Locking Rotomatics Guitar Tuners, Tuning Machines Set 3+3 18:1 Chrome Tuning Keys with Dunlop Polish Cloth Bundle Tuner Heads with Kidney Button

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

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Locking tuners for guitars. Engineered specifically for 3-left/3-right peghead configurations. Equipped with sealed, lubricated gears offering an 18:1 gear ratio. Post hole diameter: 25/64. Post length to hole: 23mm. Overall post length: 28.2mm. Contains necessary hardware (bushings, washers, screws). Functions as a direct drop-in replacement for the following series: 102-18 Series, 102V Series, 103 Series, 106 Series, 109 Series, 109-18 Series, 135 Series (Note: Top mounting hole will be visible), 136 Series (Note: Top mounting hole will be visible), 502 Series, and 509 Series

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Locking tuners for guitars. Engineered specifically for 3-left/3-right peghead configurations. Equipped with sealed, lubricated gears offering an 18:1 gear ratio.
Post hole diameter: 25/64.
Post length to hole: 23mm.
Overall post length: 28.2 mm. Contains necessary hardware (bushings, washers, screws). Functions as a direct drop-in replacement for the following series: 102-18 Series, 102V Series, 103 Series, 106 Series, 109 Series, 109-18 Series, 135
Series (Note: Top mounting hole will be visible), 136
Series (Note: Top mounting hole will be visible), 502 Series, and 509 Series

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First Listed on Newegg	July 30, 2026

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Item#: 9SIC80RM344369