Vermont Class ZZ Steel Gage Pin Set Make quick and accurate measurements with Vermont Gage Pin gages. These pin gages allow you to measure hole sizes, calculate distance between holes, gage slot widths, and are perfect for GO / NO GO gaging. Features of this set include... .2510" - .5000" Class ZZ Gage Pin Set 250 Pieces in .001" increments 2" Overall Length A Certificate of Accuracy is included Boxes and Gages are both marked Each gage has a 10 microinch finish or better Please specify PLUS or MINUS when ordering. PLUS (GO) tolerance = +0.0002" / -0.0000" MINUS (NO GO) tolerance = +0.0000" / -0.0002"