The 8-inch (200mm) digital caliper in the image is a general-purpose measuring tool typically made of stainless steel.
Measuring Range: 0-200mm (0-8")
Resolution: 0.01mm (0.0005")
Material: Stainless steel, often hardened
Features: Large LCD display mm/inch conversion
Zero setting at any position
Internal, external, depth, and step measuring functions Locking screw