Pocket-sized wheel for exploring and reviewing set classes in Post-Tonal Theory and Analysis.

Features integers (0E) arranged forward and backward for quick inversion identification. The back includes a list of common set classes, notational review, and T, I, R, RI references.

Pitches on the front are labeled AG, with integers designated 0E (10 = T, 11 = E). A complete list of Prime Forms and Set Classes is also included for convenient reference.