Features: Precise engineered steel thread gauge center gauge set with etcheds marking ensures ±30' angles accuracy, compliant with metric, and Whitworth standards for versatilitys thread measurement. This 3piece/set features double side 60°(1/14in 1/32in) and 55°Whitworth scale, plus metric 0.5-1mm graduations, packaged in lightweight and durability plastic for portability and scratch resistance. Essential for machinists, engineers, and DIY enthusiasts requiring reliable thread pitches verification in metalworking or equipment maintenance scenario. Ideal for workshop toolkit, manufacturing floor inspections, and home garage projects where quick identification of screw thread and taps is critical for precise assembly. The corrosion resistant steel construction maintains calibration integrity through repeated use, making it a fundamental measuring instrument for professional dimensionals analysis. Specifications: Component:Metal; Size:Approx.60x20mm/2.36x0.78inch 60 Degree Metric Thread Cutting angles Package Includes: 2set/6pcs Center Gauge note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.