Locking Rotomatic Tuners Mini 6 In Line (406 Series) 18:1 Gear Ratio Musicmaster Bass By turning the knob up

By turning the knob up

and controlled across all six strings

Each inlay is around 1

String pitch - 10

3 position coil selector switch (single coil

Locking Rotomatic Tuners Mini 6 In Line (406 Series) 18:1 Gear Ratio Musicmaster Bass By turning the knob upOriginal Grover, Locking Rotomatics,. Includes washers, wood screws and bushings. 18: 1 gear ratio. Simply insert the string through the hole, pull to tension by hand and begin tuning. As you tune, only the locking cam in the post turns. Once the string begins to turn, it can be tuned to pitch. In less than one revolution of the post, you will be in tune and locked. Gear box has a special lubricant for lifetime, trouble free service.