This type of spring caliper is used to measure thickness, distance, or diameter of a particular item. It is used in many fields of work and study - construction, plumbing paleontology, forensic medicine, etc. Just loosen the screw, hold the object to be measured, and tighten the screw. Measure the opening size against a flat ruler to determine the size of the object. The larger the object, the bigger size caliper you should use.

This is a 12 inch size outside spring-type caliper - choose the appropriate size as needed

Open and close the caliper with the tension screw on the side for comparison measurements

The tension screw is used to hold the caliper in the desired position for measuring

You can measure distance, diameter, or thickness of a particular item

Made of steel and useful in many work and study applications