These dual-action (two-way) truss rods are easy to install in a 1/4" (6.35mm) wide 3/8" (9.5mm) deep truss rod slot and suit guitars, banjos, and basses! Great for thinner necks that need a shallow truss rod depth. Two-way adjustable rods correct both upbow and back bow. Overall length provided includes the adjusting nut.
Note that the adjusting nut end requires to be reamed to 10mm for ~50mm length. Outer wrap colour may vary from model to model and from time to time.