Feature: 1. HIGH ACCURACY MEASUREMENT: The Thread Checker is able to accurately measure the thread specifications of nuts and bolts to ensure the accuracy of matching and connection. 2. MULTIFUNCTIONAL: The thread checker can measure both metric and US threads, providing a wide range of applicability and flexibility to meet the measurement needs of different thread specifications. 3. DURABLE MATERIAL: The thread checker is made of durable material to ensure product longevity and stability. The durable material allows it to withstand long hours of use and frequent measurements while maintaining high accuracy and reliability. 4. EASY TO USE: The thread checker has an easy to understand operation interface, which makes it easy to use even for non professionals. At the same time, it is lightweight and easy to carry and use. 5. WIDE APPLICATION: The thread checker is suitable for a variety of fields, including machinery manufacturing, automobile repair, home maintenance and other work areas. Specification: Item Type: Bolt Thread Identifier Material: 10B21 Carbon Steel Weight: Approx. 1084g / 38.2oz. Package List: 1 x Bolt Thread Identifier