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 Locking screw to ensure precision Technical Data Material: Stainless Steel Surface Finish: Satin Features: Knurled locking screw, vernier scale Range: 150 mm Resolution: 0.05 mm Overall Length: 234 mm