The newest addition to the Grover family, these locking machine heads utilize the famous 18:1 Rotomatic‚ design with a "thumb screw" mechanism which locks the string into place. Insert the string through the post hole, wrap...

A smaller version of the regular size ROTO-GRIP‚ lockers for the in line and smaller headstocks or for those who prefer a lighter feel.

These guitar machines are a triumph in engineering and style. The housing provides a maximum bearing for worm gear and string post. Gear Ratio is 14:1. Worm and gear are precision-cut for perfect meshing. This eliminates...

SELF ALIGNING THRUST BEARINGS! Gear ratio is 20:1. Special butterfly button. Durable cast housing. End thrust bearings. Worm meshes perfectly with gear. Safety-type string with cutaway shoulders to provide slip-over. Two...

The same innovative engineering and classic design as the original Rotomatics, but with smaller buttons for 6-in-line guitars, or for those who prefer a little more space for their fingers. Gear ratio is 18:1.