The gage with permanent, easy to read size markings that won't peel off. it's an indispensable tool for you. Metric to Imperial Conversion Chart - Anzor The Gauge has 28 common thread sizes -14 inch and 14 metrics, which is convenient to quickly and accurately distinguish different sizes of bolts and nuts. EXTENSIVE SIZE DETECTION: The Gauge are made for gaging of internal or external threaded surfaces. Mua 34 Thread Checker Standard and Metric Nut and Bolt Thread Checker Mini Thread Checker, Metric and Imperial Thread Checker That Can be Used Separately,28 Metric and Standard Thread Gauges with Metric and Standard Ruler, Small Size, Easy to Carry. (2 in 1 Red 14 metric and 14 standard gauge sizes are only 7., 9x3., 9x0., 8 inches (20x10x2cm), while kit gauge sizes are 7., 9x7., 9x0., 8 inches (20x20x2cm). Convenient design for easy to carry and store, a feature that sets us apart from the rest. Note: Before testing, please ensure that the threads of the parts are clean, free of burrs and other obstacles. Screw Measuring Gauge Thread Size Checker,Metric And Imperial Nut Measuring Gauge | Bolt Metric And Imperial Checker Inch and Centimeter scales on the edge, quickly identify size & length save you precious time.