Perfect playing. Clean, maintain, preserve. The Ernie Ball Guitar Tool Kit is the perfect gift or accessory for any guitar enthusiast. This quality kit from the legends at Ernie Ball is designed to give you everything you need to keep your beloved instrument looking sublime, and in perfect playing condition.You can change strings, adjust action, set intonation, check your string height and much more. A microfiber polishing cloth and their incredible Wonder Wipes leave your instrument clean and streak free. They also do their best to keep your instrument's original aesthetic appeal. Additionally, the Guitar Tool Kit features a durable hex wrench set, a heavy duty string cutter, peg winder, ruler, and a 6-in-1 screwdriver. An all-in-one Ernie Ball Tool Kit. The musician's DIY kit.