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 measurementDescription:Material:WoodenSize:12*12.5*1.5cm