1. Features: High contrast cartridge alignment protractor provides improved visibility and eliminates tracking errors. 2. Features: Avoids over-shoot distortion to maintain sound quality. 3. Features: Works with an S-shaped arm and any 1/2" mounted cartridge. 4. Features: Extra magnifier helps with clearer overhang adjustment. 5. Features: Calibration protractor only; other accessories shown in the picture are not included. 6. Specification: This is a tonearm and cartridge stylus adjustment tool for record players, simple and practical to use. 7. Specification: Clear scale, light weight, and not easy to break. 8. Specifications: Main color: white. 9. Specifications: Main material: acrylic. 10. Specifications: Item size: 190 * 40 * 2mm / 7.5 * 1.6 * 0.1in. 11. Specifications: Item weight: 20g / 0.7ounce. 12. Specifications: Package size: 190 * 40 * 10mm / 7.5 * 1.6 * 0.4in. 13. Specifications: Package weight: 22g / 0.8ounce. 14. Packing List: 1 * Calibration Protractor. 15. Package List: 1 * Calibration Protractor.