Guitar players know a little about truss rods and action, but few actually want to risk doing adjustments themselves. The GrooveTech Guitar Player Tech Kit was created to help you allay that fear and better know how to adjust your gear, cause a good setup will improve any performace. The GrooveTech Guitar Player Tech Kit provides you with everything you need to work on your guitar, including for you apprehensive types, an Easy Setup Guid that takes the mystery out of the process. Eleven hex keys are color-coded for metric and black for inch sizes, and long pattern for easy access. All truss rod sizes are ball end. Also included is a thickness gauge, ruler, capo, cutters, string winder, and 6-n-1 screwdriver. Tools are lifetime guaranteed and pro-grade.