General description The 28 Size Nut and Bolt Thread Checker is an accurate and durable identification gauge designed to quickly measure bolt length and nut diameter. It effectively separates metric from rigid thread sizes, enhancing your efficiency and saving time. This tool recognizes nuts and bolts in 28 sizes, including 14 inches and 14 metric, making it versatile for various applications. Technical specifications Material: Carbon steel Color: Black Measurement allowed error: +/- 1-3 cm Compatibility and accessories Recognizes nuts and bolts in 28 sizes (14 inches and 14 metric) Each size features external threads for nuts and washers and internal threads for bolts and screws Installation Can be installed in your toolbox or on the wall Reserved holes for hanging included No drilling required Usage Quickly identify different thread sizes using the inch and centimeter markings along the edge Other information Package Contents: 1 * Nut and Bolt Checker Note: Light reflection and