To be safe just get a bunch.
Guitar truss rod allen key size.
Use the martin guitar allen truss rod wrench to adjust your guitar s neck to achieve the action you desire.
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.
Insert the allen wrench into the slot in the truss rod.
Buy set of 9 guitar allen key hex wrenches for truss rod bridge saddle and nut.
Turn the truss rod to the right to tighten it and straighten the neck.
10 00 choose options.
Adjust the truss rod with an 1 8 inch allen wrench.
Hex wrench 5 32 wrench 5 32in.
For adjusting warmoth vintage modern and tiltback bass necks.
Turn the truss rod to the left to loosen it and increase the bow of the neck.
Guitar vintage truss rod for two piece neck.
Some manufacturers including larrivée and collings use a long bent hex key to adjust the truss rod.
The neck should be almost straight with very slight backwards angle.
Guitar vintage truss rod for two piece neck approximately 17 1 2 long.
Guitar vintage truss rod for one piece neck approximately 17 3 4 long.
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.
Size may vary depending on the guitar you are using so it ll be good to have a variety.
Bridges bridge parts.
Vencetmat 9pcs guitar allen wrench set 1 5mm 2mm 2 5mm 3mm 4mm 5mm 1 20in 1 8in 3 16in fit for most acoustic electric guitar bass neck truss rod knobs bridge nut locking adjustment 4 4 out of 5 stars 43.
Includes a 4 1 2 bent leg.