Truss rod bar dual action Hot Rod style 24" (610 mm) Bass size, 4 mm Allen nut

    Specs    

• Dual action truss rod Hot rod style

• 24" (610vmm) length for Bas guitar, also available  for guitar size (18")

• It has a smaller 4 mm (5/35") Allen nut head for  adjustment, 4mm ALLEN KEY INCLUDED

• The smooth two way actions corrects up bow and  back bow giving a complete control over the neck

• This neck adjustment features twin stainless steel  rods in threaded brass collars

• Weight: 150 grams

Installation

This truss rod fits into a straight channel (11.2x6.2 mm). For proper operation it must be installed so that the active rod (the rod with the adjustment nut) is below the passive rod. You must make a wider and deepest channel for the truss rod head (7mm x 11.7)

A wooden filler stick is not required in the channel

It´s also recommended that once you've made the channel you should spread a couple of silicone droplets in the middle of the channel before installing the rod (below and over it before installing the fretboard). That will avoid the rods vibration in the channel