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• High quality grade.
• Measurement in SAE (inch).
• Measurement Types: internal dimension, external dimension, depth and steps.
• Made of high quality hardened stainless steel. 
• Large DIAL Display.
• With a small locking thumb screw which locks the jaws in place.
• Measure range: 0 - 6"
• Resolution: 0.0005"
• Accuracy: 0.001"
• Repeatability: 0.0005"/
• Storage case with padding for maximum protection included.