Features: Elevates your guitar practice with the a robust aluminum alloy rotating music Theorys tool featuring engraved notations for durability and sophistication. The comes with four scale discs plus a baseplate, all finished with anodized sandblasting for a fashion design. Suitable for guitarists of all levels, from beginners seeking to fretboard Theorys to advanced player looking to expand their musical vocabulary. Whether in a studio session or a casual, the serves as an invaluable reference for creating solos, composing melodies, and learning new songs. This comprehensive music companion includes a portable storage bag and a stand that conveniently holds your picks, making it the perfect accessory for musicians on the go. Specifications: Texture: Aluminum Alloy S Diameter: Approx. 4.88inch(12.4cm) S Thickness: Approx. 0.16inch(0.4cm) L Diameter: Approx. 5.90inch(15cm) L Thickness: Approx. 0.16inch(0.4cm) Package Includes: 1x Guitar Scale Wheel note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color from the item.