2 pieces of 0.4mm pin gage, each gauge size is clearly marked. Tolerance: ± 0.001, length: 50mm/2-inch, surface roughness: <0.2um.Made of bearing steel (GCR15) with high permeability, the heat treatment hardness of the pin gauge is up to 58 HRC, sturdy and durable.Used for measuring holes, hole spacing, and slot width, especially suitable for electronic inspection of the precision micro holes and measuring circuit boards in the electrical hardware industryIndustrial high precision measurement accuracy ± 0.001 (Class X Tolerance ). Smooth surface, anti-rust, and wear-resistant.Notice: For high-precision measurement and calibration, it should be placed at a constant temperature of 20°C for 2 hours.Available in a range of sizes from 0.10 mm to 2.00 mm .
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