Truss rod dual action 427 mm low profile, 4mm Allen nut for thinner necks

Specs   

Dual action truss rod with very low profile (only 9mm depth) special for thinner necks

427 mm length for electric or acoustic guitar

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

2 Rods, one against the other, at one side is right threaded and left threaded at the other. When tightened by the allen nut it pulls against the other and it´s perfectly adjustable in both directions

Routing channel width 6mm, 9 mm depth    

Weight: 110gms    

Installation

This truss rod fits into a straight channel (9x6 mm). For proper operation it must be installed so that the active rod (the rod with the adjustment nut) is over the passive rod.

A wooden filler stick is not required in the channel.

It´s also recomended that once you´ve made the channel you should spread a couple of silicone dropleats 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.