The Vernier Caliper is a precision instrument that can be used to measure internal and external distances accurately. The vernier caliper has a scale sliding parallel to the main scale for an additional, fractional reading to improve measurement precision. Product Features Internal & external jaws to make outside and inside dimension measurements Metric scale Depth measuring blade Technical Data Material: Stainless Steel Surface Finish: Satin Features: Vernier scale, retainer Range: 150 mm Resolution: 0.02 mm Overall Length: 232 mm