The Martin truss rod wrench features premium materials for professional-grade instrument setup. Its ergonomic design ensures proper truss rod adjustment on all your prized instruments.
Precision ball end tip for easy fit
Ergonomic handle
Available in 4mm & 5mm
4mm, Item # 18TOOL32
5mm, Item # 18TOOL31
The 4mm truss rod wrench can be used on the following models:
Modern Deluxe Series
SC models
For all other models, please use our 5mm truss rod wrench.
