1、TIME SAVING AND USER FRIENDLY: This red nut and bolt thread detector is necessary for quickly identifying the most common sizes of nuts and bolts. 2、DURABLE AND LIGHTWEIGHT: Made of durable aluminum alloy, this tool is designed for long lasting use and reliability. It is sturdy yet lightweight, making it easy to carry. 3、VERSATILE OPTIONS: With 34 holes to choose from, you can measure various sizes of nuts and bolts, including metric and imperial sizes. This makes the tool highly applicable for various tasks and industries. 4、FOR PROFESSIONALS AND DIY ENTHUSIASTS: This nut and bolt thread detector is not only beneficial for professionals but also for hobbyists who enjoy hands on work. It's a great addition to home renovation or general maintenance toolkits. 5、CONVENIENT AND STRAIGHTFORWARD: This thread checker is incredibly convenient and easy to use. Simply insert the nut or bolt and directly determine its size, eliminating the need for time consuming measurements. Item Type: Nut and Bolt Thread Checker Material: Aluminum Alloy Metric Size: M3x0.5, M4x0.7, M5x0.8, M6x1.0, M7x1.0, M8x1.0, M8 x1.25, M10x1.0, M10x1.25, M12x1.25, M12x1.5, M12x1.75, M14x1.5, M14x2.0, M20x1.5, M20x2.5, M24x2.0, M24x3.0. Inch Size: 6-32, 6-40, 8-32, 10-24, 10-32, 1/4-20, 1/4-28, 5/16-18, 5/16-24, 3/8-16, 3/8-24, 7/16-14, 7/16-20, 1/2-13, 1/2-20, 9/16-12, 9/16-18, 5/8-11, 5/8-18, 3/4-10, 3/4-16, 1-8, 1-12. 1 x Thread Checker