Global Tuner and Global Tuner Pro:

Available in 32, 34, 37 and 42mm sizes in OFR® Spec and Gotoh/Ibanez® in 34 and 32mm sizes.

Each comprise a Secondary Spring Holder, Thumbwheel and Bell Brass Base.

The GT Pro  base is bored to receive the dual Stabilizer Housings

Dual Stabilizes are added to the Secondary Spring Holder