The Grover deluxe machine heads are mounted three to a plate for the vintage look that has been popular for decades. The stamped back plate provides a sturdy base for mounting vertically or horizontally on the head stock. The housings are securely fastened to the base insuring proper gear and worm alignment for accurate tuning. Bushing and screws included. 14:1 gear ratio.

• H138N Nickel For slotted guitar headstocks, 3 Treble and 3 Bass, Set of 2