Accurate thread pitch measurement This thread gauge measures both internal and external thread pitch with precision. It includes 51 or 52 pieces depending on model and supports imperial and metric systems from 0.25 mm to 6.00 mm, enabling reliable checks across a wide range of fasteners. Magnetic head for easy use The magnetic head attaches to metal surfaces, preventing slippage and delivering stable readings in busy workshops or industrial settings. Adjustable rotary switch for flexibility The rotary switch lets you switch quickly between thread sizes. It works well for fine or coarse threads, making measurements faster and more consistent. Strong and long lasting construction Made from stainless steel with a quenching process for enhanced strength and durability, providing reliable performance over time in demanding environments. 23 practical use scenarios In a machine , verify thread pitch on bolts, nuts, and tapped holes during maintenance or assembly. In quality control, check incoming fasteners against specifications to prevent mismatches. In DIY or projects, ensure replacement screws and threaded components match the required pitch for proper fit. Key benefits Wide compatibility with imperial and metric threads Broad measurement range from 0.25 mm to 6.00 mm Durable stainless steel with proven longterm accuracy Easy, stable readings with a magnetic head Quick size changes via adjustable rotary switch This gauge provides clear, dependable measurements for reliable fastening and assembly.