Features: Thread Tester is a indispensable tool for professional, featuring 28 precise nut and bolt thread checker in both standard and metric size for comprehensive coverage. Crafted from aluminum, this screw identification gauge boasts clear engravings and easy to read digital displays, ensuring accurate measurements. For mechanical engineers, carpenter, electronics technicians, and enthusiasts who demand precise thread sizing in their work. Whether it's for automotive repairs, home renovations, or maintaining electronic devices, Thread Size Checker simplifies the task of identifying and measuring screw size. Enhances your toolkit's capabilities with this user friendly thread checker, a must for any focused project. Specifications: Material: Aluminum Size: About. 198x198mm/7.75x7.75in Package Includes: 1pc Thread Tester note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.