Compact steel wrench for slotted truss rod nuts. A StewMac exclusive! Here's a handy little crank-action steel wrench made for heel-adjustable slotted truss rod nuts. A vintage-style Tele requires only simple pickguard removal. Straight and diagonal ends let you work without unstringing the guitar.Compact 3-9/16" (90.49mm) length fits a guitar case.