Features: This combo pack combines the essential guitar setup tools, including a precisions string action gauge and neck relief gauge, to provide accurate measurements for adjusting electric, acoustic, classical, and bass guitars effortlessly. Featuring a stainless steel rod gauge with three common relief settings and a string action gauge offering inch, metric, and 64ths scale, a pickup height ruler for fine tuning sound, all with easy to read etched markings. Ideal for guitarists, hobbyists, and professional technicians seeking stable guitar accessories to enhances instrument playability and performances. Use it for home workshops, music studios, or repair for precise guitar setup tasks like adjusting string height or neck curvature. These gauges include step by step guidelines, enabling anyone to achieve optimal guitar sound and feel with minimal effort. Specifications: Component: Plastic+Stainless Steel+Iron Neck Curvature Ruler Size: Approx. 2.87x0.51inch(73x13mm) String Distance Ruler Size: Approx. 4.06x2.05inch(103x52mm) Package Includes: 1x Pick 1x Curvature Ruler 1x String Gauge 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.