Description: 26 Piece Set: 26 Piece Nut and Bolt Thread Checkers, including 14 Inch and 12 metric sizes; Metric size: M4x0.7, M5x0.8, M6x1.0, M7x1.0, M8x1.0, M8x1.25, M10x1.0, M10x1.25, M10x1.5, M12x1.25, M12x1.5, M12x1.75; Inch size: 6-32, 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, 1/2-20Inch and Metric Thread Checker: The thread checker can quickly and accurately identify different sizes of bolts and nuts, covering the most common thread sizes; Easy to use, quick measurement, save time and effort, improve work efficiencyPortable: This compact thread checker makes it easy to carry, allowing you to bring it conveniently to your worksite or project; With hanging storage design, easy to hang on storage rackApplication: The Bolt Size and Thread Gauge Set is suitable for auto repairers, plumbers, mechanical engineers, and DIY tool enthusiastsPremium Material: The bolt and nut identifier gauge set is made from aluminum alloy material, well crafted and sturdy, ensuring wear resistance, durability, and long term use; The size markers are clear reading Specification: Material: Aluminum alloy Color: Blue, Red Size Chart: Red total length 50cm/19.69inch, Blue total length 51cm/20.08inch Package Includes: 1 Set of Nut and Bolt Thread Checkers(Include 26Pcs) Note: Please allow slightly errors due to manual measurement and different monitors.