Vermont Class ZZ Steel Gage Pin Library Make quick and accurate measurements with Vermont Gage Pins. With these Gage Pins, you can measure hole sizes, calculate distances between holes, gage slot widths, check locations, and perform GO / NO GO gaging. Features include... Class ZZ tolerance: 0.0002" Pins range in size from .0610" to 1.0000" 940 pc Library, .001" Increments Supplied with 7 Drawer Metal Cabinet GO - PLUS NO GO - MINUS 2" long 10 microinch finish or better Certificate of Accuracy or better Please specify PLUS or MINUS when ordering. PLUS (GO) tolerance = +0.0002" / -0.0000" MINUS (NO GO) tolerance = +0.0000" / -0.0002"