Pocket Piano Chord Reference Fingering Chart for Keyboard Handy pocket guide to 238 chords for keyboard Even the tougher chords like: Min 6th, 11th, 7th Aug, and 7 SUS 4, etc. Nicely laminated for lasting use. Simple to use, easy to carry. Only 4 X 5 inches. The spelling (fingering) of chords is easy to read. Works on all keyboard instruments: Piano, organ, accordion, electronic keyboards, etc.