Music theory chord wheel laser cut from 1/8" Baltic birch. Can also be custom laser engraved with your initials, logo or message of choice. Measures 6" Use this to determine relative chords and notes for sharps, flats, diminished, augmented notes in the circle of fifths. Makes a great gift for musicians and songwriters! FREE U.S. DOMESTIC SHIPPING! Chord Wheel, Music Theory, Circle of Fifths, Music Tool, Music Gifts, Laser Engraved, Guitar, Piano, Violin, Piano Theory, Custom Laser