1. Package includes: You will receive 1 thread tester for nuts and screws, which is sufficient for daily use. Our nut and bolt thread gauge is versatile and can be easily mounted on the wall or stored in a toolbox. It features predrilled mounting holes and is suitable for both professionals and DIY enthusiasts. 2. Inch and Metric Thread Gauge: This screw and nut identifier is crafted from durable aluminum alloy and carbon steel, ensuring reliability in various environments. Use our thread tester to quickly identify up to 28 different sizes of screws and nuts, covering the most common thread sizes. 3. DualScale Design Tool: Both sides of this thread checker feature clear, laserengraved metric and imperial measurements, making it easy to read and use. The dualscale design allows for quick measurement of screw lengths, simplifying the process of verifying nut and bolt sizes without needing to visit a hardware store. 4. Easy to Use: The bolt thread tester includes screw holes at the for convenient wall, workbench, or toolbox mounting. Its integrated design keeps all components neatly organized, preventing loss or confusion. The sturdy bolt identifier card is portable, allowing you to carry it anywhere with ease.