Features: Ensure precise thread measurement with the Bolt Size and Thread Gauge, for perfect nut and bolt compatibility, reducing errors in your projects. Crafted from aluminum, this tool offers 26 male/female gauges in both inch and metric size, ensuring easy identification and long readability. For mechanical engineers, repair technicians, DIY enthusiasts, and professional assemblers who demand accuracy and reliability in their work. Perfect for a wide ranges of applications including home repair, construction, appliance maintenance, plumbing, and gas installations, making it a essential addition to any toolboxes. Simplifying your workflows by quickly verifying thread with our nut and bolt checker, saving time and money by avoiding incorrect replacements and unnecessary returns. Specifications: Material: Aluminum Single Length Adjustable: 42-46.7cm/16.54-18.39in Package Includes: 1 Set 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.