The Portable Precision Thread Size Checker Keychain provides quick, reliable thread size verification in a compact, portable form. It eliminates guesswork and the need to test random sockets, letting you confirm the workpiece size with a singlehanded slide of the knob. Key benefits Fast, accurate measurements: determine thread size in seconds with a smooth, onehanded knob operation. Portable and ready when you are: includes a keychain ring for easy belt, bag, or toolkit attachment, ensuring it's always within reach. Durable and versatile: built with quality materials for dependable performance across a range of applications. Dualunit readability: supports metric and imperial units for convenient, precise measurements on any project. What makes it stand out Quick size verification without trialanderror testing. Onehanded operation that saves time during busy work. Compact, attachanywhere design that fits into everyday workflows. Clear metric and imperial readings for broad compatibility with fasteners and components. Specifications and functionality Product: Portable Precision Thread Size Checker Keychain Operation: singlehanded knob slide to confirm workpiece size Construction: quality materials for durability Units: metric and imperial for versatile use Practical usage scenarios Machine or maintenance bay: quickly identify thread sizes on bolts, nuts, and fittings to source correct replacements. Field service or onsite : verify thread size before ordering parts or performing installations, reducing downtime. DIY projects: determine thread size for adapters, connectors, or fasteners to ensure proper fit and compatibility.