Jiayouy Pack of 2pcs 420mm Two Way Rod Type Guitar Truss Rod Steel with L- Wrench for Electric Acoustic Bass Guitars Neck Repair Adjustment Luthier Tool

Two main complaints: one, the included adjustment hex wrenches are not the correct size to work with these rods (way too small). Secondly, and most importantly, these are NOT 2 way truss rods. Once you get them flat, any attempt to turn the rod further counterclockwise (to add relief) just results in unscrewing the hex nut from the end to f the rod - a true 2-way rod should adjust both ways (to reduce relief due to string tension and to add in more relief if the wood moves and/or lighter gauge strings are insufficient to maintain proper relief)!

Seems well made have not installed it yet still in the process of making the guitar neck. Will give an update when completed.

well made truss rods

Estuve buscando este tipo de Varillas y la verdad es que por el precio de una prácticamente me dieron 2, ya instalé una y funcionó perfectamente y me quedé con otra de repuesto además a pesar de ser enviadas desde Estados unidos llefaron en 3 días.

Aunque la original es poco mas corta esta quedo perfecto y ahora se puede usar una llave Allen common.

Es justo el producto que anuncia!