Calipers

What is it?

Calipers measure inside, outside, and depth dimensions with fine resolution. Dial and digital calipers read to thousandths of an inch or hundredths of a millimeter, making them a metalworker standard.

What is it used for?

• Measuring inside and outside diameters
• Measuring depth and step heights
• Precision dimension checks

How to choose

Choose digital for quick reading, dial for battery-free permanence, and jaw type (standard or offset) by reach. A 6-inch caliper is the general size.

Anatomy

Understanding the parts of a calipers helps you use, maintain, and buy it with confidence.

• Body: the main working portion of the tool
• Working end: the part that contacts the material
• Handle: the part you grip for control and leverage

Materials & construction

Quality caliperss are made from hardened, heat-treated steel (often chrome-vanadium or high-carbon) chosen for strength, edge retention, and resistance to wear and corrosion.

Safety & maintenance

• Inspect the tool before use and replace any that are worn or damaged
• Use the right tool for the job and apply controlled force
• Store tools clean and dry to prevent corrosion
• Wear appropriate eye protection for the work

Also known as

vernier caliper, digital caliper