Chord Wheel: The Ultimate Tool for All Musicians

Excellent product. But for a card product it is highly priced.

Very useful for identifying chords to use and to transpose to a different key

For those with medium knowledge and who would seriously like to play by ear and enjoy their instrument - it is well worth it.

The wheel above is the useful device.

It is very useful for those learning the keyboard playing and Music Theory like me.

Great informative reference, arrived as promised

Very good informative book.

Good but plastic top wheel detached due to make and packaging. Why publisher don't use good attachment.