For calibrating depth error of all types of caliper depth rods, outside accuracy inspection and zero setting of depth micrometers, depth calipers, dial depth gauges.
Made of heat treated hardened tool steel, hardness: HRC58-62.
Checker body and base are chromed polished, wear resistant, and rust resistant to ensure measuring accuracy and durability.
Checker face dimension tolerance:±0.003mm parallelism and flatness max error: 0.002mm
Granite base 100x100x50mm
Cylinder measuring gauge set
5、10、15、20、25、50、75、100mm*2
Lock pin Φ3xL15mm 20pcs
Full set includes wooden case, quality warranty, and JCC calibration report comply with ISO 9001 measuring traceability & ISO/IEC 17025 accreditation.