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:

• DSS and OMSS Models
• Modern Deluxe Series
• SC-13E

For other models, please use our 5mm truss rod wrench.