Grover Deluxe Vintage Guitar Tuning Machines 14:1 Ratio - 3 per side - Nickel Features a sturdy die-cast housing with permanently lubricated gears and ivoroid keystone buttons. 14:1 ratio Requires 3/8"(10mm) peghead holes. Includes screw-in bushings and mounting screws. NICKEL; Manufacturer Part Number: 135N; Features Grover's lifetime guarantee