This handy tool boasts 5 Balistics Nylon (non-scratching!) hex wrenches in the most commonly used sizes which are perfect for tightening tuner bushings, pots, instrument output jacks, and amp and pedal input jacks, as well as both philips and flat head screw drivers for easy adjustment of string retainers, strap buttons, pickup height, pickguard screws, intonation....etc etc etc.