• Minimum Diameter (Decimal Inch): 0.501 • Maximum Diameter (Decimal Inch): 0.625 • Tolerance Type: Minus • Number of Pieces: 125 • 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