Measures imperial and metric fasteners, including coarse and fine threads. Reads diameter, pitch, and length for most bolts and screws quickly and accurately. Range and compatibility Length coverage: from #4 to 1 inch Metric range: 3 mm to 22 mm Works with a wide variety of fasteners found in automotive, home improvement, and general mechanical projects Who it's for Suitable for both hobbyists and professionals who need reliable measurements Simplifies sizing to reduce incorrect fasteners and rework Provides a consistent, repeatable way to verify fastener size across projects Durability and value Precisionmade for durability and longterm use Sturdy construction designed to last for years Built with costefficient manufacturing techniques and quality materials to provide reliable measurements and longterm value Typical uses Automotive repairs: verify bolt or screw sizes for engine components, brakes, or suspension parts Home improvement: sizing fasteners for furniture assembly, shelving, or hardware installations General maintenance: sizing fasteners for machinery, bikes, and miscellaneous repairs How to use Align the fastener with the gauge markings to determine diameter, pitch (thread type), and length Confirm readings in both imperial and metric scales to ensure correct fastener selection This gauge covers the essential sizing needs for imperial and metric fasteners, including coarse and fine threads, with a practical range that supports common automotive, home improvement, and mechanical projects.