Our TMB3 is designed to give you endless possibilities of tuning exploration. Machined to retrofit your Strat. (Tremolo adapter block may be required). Includes installation instructions and hardware. Tuning chart included. Here's how it works...... The Trilogy provides you with instant, smooth, and precise retuning of each string to three player-preset notes by means of specifically designed cam levers. Each string is independent of adjacent strings. (Tuning ranges of the 6th and 5th strings are approximately an octave; the 4th and 3rd strings are over a fifth; the 2nd string is approximately a fourth; and the 1st string is over a minor third.)