Vernier caliper — carbon steel construction, high-accuracy 0.02 mm resolution for measuring internal and external cylinder diameters. Key benefits Accurate, reliable measurements: 0.02 mm resolution provides precise readings to reduce fitting errors and rework. Durable construction: made from carbon steel for long service life in workshop and industrial use. Easy to use: classic vernier scale layout makes readings straightforward and adjustments convenient, so measurements are repeatable and fast. What it does and why you need it Measures internal and external diameters of cylinders and other round parts with high precision, enabling accurate assembly, maintenance, and quality control. Eliminates guesswork when checking bore sizes, shaft diameters or mating parts, helping you confirm tolerances quickly. Compact, manual design requires no power source and is ready to use on the bench or at the machine. Key attributes Function: internal and external diameter measurement (vernier caliper). Material: carbon steel for durability and stable measurement surfaces. Performance: high-accuracy instrument with 0.02 mm resolution. Usability: simple vernier scale operation for precise, repeatable readings. Practical use cases Engine rebuilding: verify cylinder bore diameter and piston clearance during disassembly and reassembly. Precision machining and quality control: check external shafts and internal bores on machined parts to confirm tolerances before final assembly. Workshop and maintenance tasks: measure pipes, rollers or cylindrical components for fitment, replacement, or repair. Quick usage tip Use the vernier scale to read measurements to 0.02 mm accuracy; ensure jaws are clean and closed lightly when zeroing for best repeatability. Specifications Material: Carbon steel Accuracy/Resolution: 0.02 mm Primary functions: Internal and external diameter measurement (vernier caliper)