Designed to the adjusting hole of the guitar neck relatively deep. Adjust the guitar neck straight, compatible with martin guitar.
Two way L-shape truss rod, convenient to insert the sound hole and adjust the neck. Helps get the action set up right for acoustic and electric guitar, bass, banjo, mandolin and other stringed instruments.
Neck wrench specialized to the adjusting hole of the guitar neck relatively deep.
Ball end allen wrench made of metal, anti-corrosion and durable. and portable size allows easy to just slide in the pocket of your bag or case.
Package includes 4mm silver and 5mm black ball end allen guitar wrench, makes your guitar setup work much easier, a must needed addition to your guitar tool kit.