Guitarworkbench Truss Rod Master Set, Tools for Guitars, The truss rod master set provides a compilation of different plug and pin wrenches, in order to perform truss rod adjustments of different brand guitars, Professional Chrome Vanadium quality, Comes in sturdy plastic case, 3x Socket wrenches 1/4""- 9/32"" - 5/16"", 4x Pin wrenches 1/8""- 3/16"" - 4 mm - 5 mm, Made in Germany