Features 1、Efficient Identification and Customized Design: Our nut and bolt thread checker is specially designed for the most common threads, instantly identifying 18 different metric and imperial sizes with accuracy, improving work efficiency. 2、Drill Bit Size Measurement Included: The top of the gauge now includes measurements from 3/32 to 1/2 inches, allowing for convenient measurement of drill bit and screw diameters. 3、Accurate Length Measurement: Equipped with a side ruler, our screw size thread gauge allows for accurate measurement of screw, nut, and other tool lengths, ensuring clear and accurate results, adding convenience and accuracy to the user's workflow. 4、Durability and Accuracy: Made of premium aluminum alloy, designed for high accuracy thread processing, ensuring reliability and durability in various working conditions. 5、Portable Design and Practicality: Our thread checker is designed for portability, featuring drill holes and anti slip pads for easy installation on wall or placement on workbenches, making it an indispensable tool for professionals and enthusiasts, enhancing work efficiency. Specification Item Type: Thread Checker Material: Aluminum Alloy Thread Sizes: 18 Metric and imperial sizes Drill Measurement: 3/32 to 1/2in Length Measurement: Includes side ruler Package List 1 x Thread Checker