GrooveTech CT-GTATC1 Acoustic Guitar Tech KitThe most common setup needed on acoustic guitars is the truss rod but adjustment nuts aren't necessarily easy to get to, particularly if accessed through the sound hole. Central to Acoustic Guitar Tech Kit is a clever locking bit driver that allows for quick interchange of bits, with special bits for both sound hole and headstock truss rod adjustment. The Easy Setup Guide walks you through the basic setup process to keep your guitar in top playing