BASS GUITAR TRUSSROD
These twin bar steel truss rods are used for straightening/adjusting electric bass guitar necks.
The length is - 578mm.
These will fit into a 6.5mm slot cut along the guitar neck before fitting the fingerboard
An allen key can be used to tension the rod which will cause it to flex.
This allows some degree of adjustment to the straightness of the neck.
We have other guitar parts in our shop.