Product Introduction: The GUITAR XTENDER KEY Hip Shot is a replacement peg that can be used to instantly drop tuning with a single touch of a guitar string that sets the strings from E to D. Note (Disclaimer)> Please read *Tools such as a screwdriver are required for installation. If you are not confident about installation, we recommend that you ask a professional repair man. Depending on the shape of the guitar, the product may not be compatible. We appreciate your understanding.