Features: The metal wire and string diameter tool features a 2mm thickness design for high accuracy, ideal for measuring wire and string diameters with exactness, addressing the limitations of traditional measuring devices. This tool offer excellent wear and corrosions resistance, making it suitable for extended use by specialists and reducing the need for frequent tool replacements. With a small and light structure, this tool is easy to carry and allows for quick measurements without additional devices, perfect for field work by engineers and instrument maintenance technicians to improve work efficiency. The typical length of this tool is suitable for measuring various dimensions of wires and strings, making it a multi-functional device for specialists and hobbyists alike. Ideal for Instrument Maintenance: Specifically made for instrument maintenance personnel, music enthusiasts, and professional tuners, this tool ensures exact measurement of wire and string diameters, maintaining the best playing condition of musical instruments. Specifications: Component: metal Parameters: Outer diameter ruler 2mm thick Package Includes: 1pcs Wire Diameter Measurement Tool note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.