– For quick and accurate measurements. Measure hole sizes, slot widths, calculate distances between holes, use as Go/NoGo gauging, etc. – Furnished in attractive molded plastic case. – Class ZZ guaranteed to 0.0002″/0.005 mm tolerance limit. – Inspected with equipment which has been calibrated and is traceable to NIST. – Marked with size and direction of tolerance on gauge over 0.060″/1.5 mm. – Hardened drill rod RC 60-62, 2 inches long. – 10 micron finish or better