Features: Comprehensive Thread Checking: Our nut and bolt thread checker provides a complete solution for quickly identifying and verifying male and female thread sizes in both standard and metric measurements, ensuring accurate and efficient measurements every time. Durable Carbon Steel Construction: Built to last, our thread identifier gauges are constructed from quality carbon steel, offering reliable and long-lasting performance for all your thread checking needs. Easy Sizing and Identification: Designed to meet usa standard specifications, our thread identifier gauges make it easy to quickly check nuts and bolts, providing accurate and hassle-free identification of thread sizes in both standard and metric measurements. Versatile and Precise: Whether you need to verify metric thread sizes or identify the size of nuts and bolts, our thread checker is the perfect tool for the job, offering versatility and precision in one convenient package. Convenient and Time-Saving: With our male/female thread gauges, you can save time and effort by quickly and accurately checking the thread size of nuts and bolts, making it a must-have tool for any workshop or diy enthusiast. Specifications: Material: Carbon Steel Weight: 2lb Note: Due to the screen lighting effect, the actual color of the product may be slightly different. Due to manual measurement, please allow size error. Include: 1 Set Nut and Bolt Thread Checkers(26pcs)