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Answer: The primary distinction between a vernier caliper and a screw gauge is that the former is used to measure only the exterior dimension. In contrast, the latter measures both the external and interior dimensions. Vernier calipers have a minimum count of 0.01 mm, whereas screw gauges have a minimum count of 0.001 mm.
The micrometer screw gauge and the vernier caliper are tools for measuring length.
