Features: *High-quality material: This product is made of high-quality material, which is wear-resistant and durable, and can be used for a long time. *Durable: Wooden melodys tools are lasers cutter cut, hand sanded and hand assembled. Durable and not easily damageds. *Utilities: Utilities for finding naturally complementary chords and notes in a key. Easily create chord progressions. *Great Tool: Innovative and practical tool for beginners, intermediate and professional musicians. *Application: The melodys tool puts chord theorys into practical use. You can determine which chords belong to a particular key and instantly analyze any progression. Notice: *Actual color may be slightly different from the image due to different light effect *Please allow 1-3cm deviation due to manual measurement Description: Material: Wooden Size: diameter 12.5cm Package List: 1 x Wooden Melodys Tool