This set comes with calibration certificates traceable to NIST that state each tool has passed a test for accuracy. It includes a caliper, a micrometer, and a case. The micrometer has a friction thimble with a constant-force mechanism, so that once the spindle contacts the surface of the measured object, it will stop tightening. This ensures repeatable measurements and prevents over-tightening. Once the spindle stops tightening, the thimble will continue turning with resistance.

Zero-position memory, also known as absolute (ABS) positioning, retains the measuring position when the caliper or micrometer is turned off. A zero-set button allows you to start measuring at any point.