Different manufacturers put them in different places but they re usually at the headstock under a cap just behind the nut or where the neck joins the body just under.
Allen key truss rod.
Kaish 2 sets m3 and m2 5 guitar hex allen wrench key for floyd rose tremolo bridge.
2 allen wrench hex key for guitar locking tremolo bridge and nut.
It fits well into the truss rod end and enables easy.
Tacklife hex key allen wrench set 26 pcs sae metric allen wrench set with long arm ball end 3 64 3 8 in 1 27 10mm heat treated chrome vanadium steel hhw3a 4 6 out of 5 stars 271 13 97 13.
The truss rod on my martin gpcpa5k needed some minor adjustment.
This item set of 9 guitar allen key hex wrenches for truss rod bridge saddle and nut.
I didn t want to risk damaging the hex head and or the guitar by trying to use adapt a standard profile hex key.
This tool is made for the job.
Find the right truss rod wrench size needed in a database of over 75 guitar and bass brands including fender prs gibson martin ibanez taylor jackson takamine schecter yamaha breedlove and many more.
Some manufacturers including larrivée and collings use a long bent hex key to adjust the truss rod.
Use the martin guitar allen truss rod wrench to adjust your guitar s neck to achieve the action you desire.
You can adjust the truss rod with a nut located at one end.
These builders don t drill a hole through the cross strut brace glued under the top between the soundhole and neck block and the curved key lets you reach around the brace to engage the truss rod located in the neck block photo 2.
The neck of most guitars has what s known as a truss rod which is a one or two piece adjustable metal rod that goes down the inside of the center of the neck.
Push it all the way in.
10pcs 3mm guitar hex allen wrench key for electric guitar tremolo bridge.
The business end of the truss rod is recessed deep within the sound hole.
An old school truss rod bolt at the bottom of the neck image credit.