4mm Allen Nut Hot Rod Truss Rod

You'll likely need the special width router bit to get the exact slot width. I got close with two router passes of a 3/16" bit but it was a trick to set up. Got it installed and put the wrench in the socket just to loosen it up and the end broke off ! I'm quite disappointed and I can't return it now cuz it's stuck in the neck. Wary of trying this again, I prefer the old fashioned Gibson type for reliability.

This Hot Rod is perfect for my work! Can't wait to see the final result.

I've used these in several guitars and basses. They are far superior to the traditional Gibson style truss rod setup. For one, they install easy - just cut the flat channel, and pop it in. No top filler stick is required. No cutting, tapping of threads or peening and anchor nut. They adjust upbow and backbow, and respond quickly to just a slight turn of the nut. Well worth the few extra dollars. They are a bit deep, so pay close attention when shaping your neck in the erea below the nut.

Very easy to install for a rookie like me, thanks for the instructions sheet added!

Nice sturdy rod and very easy to install. The only minor scruple I have is that the adjustment nut gained a bit of surface rust fairly quickly. Other than that it is a great product, happy to have used it

These are not only high quality but much easier to install than conventional truss rods. And they adjust both ways, can't ask for a better product.

I have only used the StewMac 2Way Truss Rod for all Kopp String Instruments guitars. There is a reason for this...it has never failed me...ever.
Just recently, they switched to a 4mm size Allen Nut, and it only made me mad because I now own about 17 1/8" Allen Wrenches that I "used to" throw in the case of every Kopp Archtop.
Still so happy with this Truss Rod that I now have to buy a couple dozen 4mm Allen Wrenches per year. ;)
Denny Kopp,
Kopp String Instruments.

I couldn't be more pleased. The installation of the truss rod & carbon fiber rods was as simple as it could possibly be when used with the corresponding router bits. I will be able to show my customers my commitment to high quality in the instruments I build by the use of these products provided by Stew-Mac. Thanks, I haven't been disappointed with any product I've purchased from Stew-Mac yet. Thanks, "Doc" DiLorenzo guitars & basses

I installed this Hot Rod truss rod in my guitar neck and it fits correctly, thanks for the instruction note delivered with it

I use this rod in all of my guitars and if I rebuild a neck this is the rod I use.