The Grover Roto-Grip Locking Rotomatics Machine Heads with Keystone buttons offer a perfect blend of vintage styling and modern utility.
Effortless Locking & Precise Tuning
The Roto-Grip mechanism is designed for simplicity and reliability.
To change a string, you just thread it through the post, give it a partial wrap, and tighten the thumb screw on the back of the housing to lock it down.
This setup is ideal for players who want to minimise string slippage during aggressive playing or heavy vibrato.
Inside, the tuners are built with a high 18:1 gear ratio, allowing for very incremental and smooth tuning adjustments.
The gears are also sealed and permanently lubricated, ensuring the mechanism remains protected from the elements for years to come.
Versatile Hardware Upgrade
These tuners are an excellent "drop-in" upgrade for many guitars currently using standard Grover 102 or 502 series machine heads.
Because they share the same mounting footprint, they can often be installed without drilling new holes, making it easy to add locking functionality to your instrument.
The set is configured for 3+3 headstocks and includes all the bushings, washers, and mounting screws required for a professional-standard installation.
Grover Roto-Grip Locking Rotomatics Machine Heads Set 3+3 with Keystone Buttons Specifications & Features
Rear thumb screw locking system for secure string retention and fast changes
Classic "Keystone" tulip-style buttons for a traditional vintage look
18:1 gear ratio provides exceptionally fine and accurate tuning control
Sealed-in, permanently lubricated gears for a lifetime of smooth performance
Fits standard 25/64 inch (approx. 10mm) diameter headstock post holes
Post length of 23mm to the string hole with a 28.2mm total post height
High-quality steel construction with a total set weight of 9.6oz
Locking mechanism accommodates string gauges up to a maximum .074
Direct drop-in replacement for Grover 102, 103, 106, 109, and 502 series
Complete 3+3 set includes all necessary mounting hardware
Durable chrome or gold finish designed to withstand regular professional use