The Vernier Caliper is a precision instrument that can be used to measure internal 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 jaws to make inside dimension measurements Metric scale Locking screw to ensure precision Technical Data Material: Stainless Steel Surface Finish: Satin Features: Knurled locking screw, vernier scale, retainer Range: 600 mm Resolution: 0.05 mm Overall Length: 740 mm