Economical General Purpose Pin Gages Make quick and accurate measurements with pin gages. Measure hole sizes. Calculate distances between holes. Gage slot widths. Check locations. Use for Go/No-Go gaging. Size in micrometers and snap gages. These economical gages are a must for anyone making frequent and varied measurements. Class ZZ (.0002? or .005mm tolerance). Increments: .001" or .02mm. 2" Long.