Comprehensive Thread Checking Tool: Equipped with 26 dual male/female gauges covering 14 inch and 12 metric sizes, this Nut & Bolt Identifier is indispensable for consistently verifying thread sizes. Perfect for eliminating guesswork and ensuring compatibility. Stainless Steel Construction: Constructed from premium metal, our is robust and built to endure rigorous usage, promising years of reliable service in any workshop setting. Each gauge is expertly crafted to offer both durability and precision. Black Oxide-Coated Metric Gauges: Our set includes 12 easy-to-identify metric sizes ranging from M4x0.7 to M12x1.75, all treated with black oxide for enhanced durability and corrosion resistance, ensuring sustained performance for engineering and automotive applications. Zinc-Plated Inch Gauges: The kit features 14pc inch gauges, sizes from 6-32 to 1/2-20, offering exceptional resistance to corrosion. The clear, permanently stamped markings on each gauge allow for quick identification and