Music Nomad Premium Truss Rod Wrench 4mm for MARTIN® Guitars

Fits MARTIN® Guitar models DSS, OMSS, Modern Deluxe Series, SC-13E. All other MARTIN® Guitars Use Our 5mm Size. This will Work for all Other Acoustic Guitars Brands that Require a 4mm Truss Rod Wrench Size in the Soundhole.
Ball End Design with Durable Steel Construction and a 4.75″ Long Arm for the Most Popular Acoustic Guitars with a 4mm Nut Size.
Ergonomic Handle for Extra Length, Comfort and Control to Reach your Truss Rod in the Soundhole.
Laser Etched 4mm Size in the Metal so You Always Know the Size Working With.