The Pitch-Key attaches to any string in between the nut and the tuning post of your guitar. It allows you to preset two different pitches for that string and to quickly switch between those pitches by rotating the thumb-wheel. It can be fitted and removed in seconds. You don't even need to remove the strings. In standard tuning, your guitar plays and sounds just like normal but when you want alternative tunings, the Pitch-Key gets you there and back without any distraction from your playing. Use one, or more Pitch-Keys on your guitar, so you can be as experimental as you like.The Pitch-Key can be used on Electric and Acoustic guitars of nearly any type, enabling you to set up an alternative tuning which is ready to access whenever you want, you can even change tuning within the same piece. Add instant Drop D tuning or many other variations to greatly expand the musical range of your guitar.