Review on The432 Universal Thread Gauge by Thexton by Chris Hall

Made of soft aluminium. They cover a wide range of hole and thread sizes. The most common hardware and household sizes are covered. Very small sizes for a hobby - no. The design makes it easy to grade every screw or bolt you come across. However, they do not help you to measure the internal thread on a threaded hole or nut. I was a bit disappointed with the caliber of the aluminum as I don't expect them to take a lot of abuse and need to be kept in a protective case. They are very light and overall I am happy with my cost.