Features 1、Project Planning: The bolt and nut thread checker is the ideal tool for quickly sorting through bolts and nuts, saving time in finding the right sizes for your project or hardware store visit. A must have for your toolbox and a great gift choice for enthusiasts or dads. 2、Integrated Design: This gauge features nail holes for bolt measurement, side pins for both imperial and metric nuts, and embossed thread profiles for identifying pitches at the back. With a wall mounting hole, and vibrant colors, it stands out in your workshop or garage for quick accessibility. 3、Accurate and Sturdy Construction: Crafted from heavy duty reinforced plastic with a thickness of about 5/32 inches, this gauge is robust, crack resistant, and sturdy. The clear, easy to read text, smoothly appearance, and lack of rough edges ensure handling without harm to your hands. 4、Compact and Lightweight: Measuring 3.3 inches wide by 8.7 inches long, the nut and bolt gauge is space saving and fits perfectly in most portable toolboxes. It can also be easily mounted on a workbench or wall, preventing loss and serving as an necessary tool for your garage or workshop. 5、Comprehensive Sizing Options: This gauge offers a comprehensive range of imperial sizes ( #4, #5, #6, #8, #10, 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 3/4), metric sizes (M3, M4, M5, M6, M7, M8, M10, 12, M14, 16, 18, M20, M22), and nut sizes (#6, #8, #10, 1/2, 1/4, 3/8, 5/8, 5/16, 7/16, 9/16). Suitable for measuring fractional bolts ranging in size from # 4 to 1 inch to 7 inches in length, measure the sizes of metric bolts and screws from 3mm to 22mm. Specification Item Type: Nut Bolt Thread Gauge Material: Plastic Features: Smoothly appearance, high accuracy, high hardness, stable performance, sturdy texture Width: Approx. 8.38cm / 3.3in Length: Approx. 22.1cm / 8.7in Thickness: 5/32in  Package List 1 x Nut Bolt Thread Gauge Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin