Precision screw and bolt gauge designed for reliable, long-lasting measurements. Key benefits Accurate, repeatable measurements: Engineered for precision so you get consistent results when identifying screw and bolt sizes. Durable construction: Combines cost-effective manufacturing with high-quality, wear-resistant materials for long service life. Secure handling: Textured, non-slip finish and precise positioning features reduce movement during measurement. Broad compatibility: Measures a wide range of fasteners so you can use one tool for most jobs. What it measures Lengths from #4 to 1 Metric fasteners from 3 mm to 22 mm Diameter, length, and most thread profiles for screws, bolts, and nuts (includes coarse and fine threads) Materials and performance Made from high-quality materials designed to resist wear and maintain accuracy over time Construction focused on long-term stability to preserve measurement precision under regular use Practical uses Auto repairs: Quickly identify replacement screws, bolts, and nuts when servicing vehicles. Home improvement and DIY: Choose the correct fastener for furniture assembly, shelving, or repairs without trial and error. Workshop and maintenance: Inspect incoming hardware, verify sizes before installation, or sort mixed fasteners efficiently. Why you need it Saves time by eliminating guesswork when identifying fasteners Reduces mistakes from using the wrong size fastener Durable design means fewer replacements and reliable measurements over years of use Specifications Measures lengths: #4 to 1 Metric range: 3 mm to 22 mm Suitable for screws, bolts, nuts, and most thread types A practical, dependable tool for mechanics, hobbyists, and professionals who need fast, accurate identification of common fastener sizes.