While similar in design and content, each kit is optimized for either a guitar or bass. Both include a precision 6-in-1 screwdriver that contains two each Phillips and slotted tips, and two nut drivers (1/4 and 5/16 -inch to handle Gibson and other truss rod nuts). Also included is a 3 LED flashlight, steel ruler, string cutters, 15-blade thickness gauge, and capo. The GTBK1 bass kit has 8 hex keys. Hex keys are color coded gold for metric and black for inch sizes, and long pattern for easy access. Truss rod sizes have a ball-end.
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