Martin 18TOOL32 CFM Logo – Truss Rod Wrench, 4mm (Model MGTAW4) pink or used on its side

or used on its side as a floor wedge monitor

and even unexpected chorus-inspired sounds just to name a few

and NOS EF732 tube—each UA Bock 167 is built and tested to David Bock's exacting specifications

12-inch premium two-way full-range loudspeaker with 90° x 40° rotatable waveguide

* Ideal for the Beginner

Martin 18TOOL32 CFM Logo – Truss Rod Wrench, 4mm (Model MGTAW4) pink or used on its sideThe 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.