Meyer Class Z Steel Gage Pin Library Make quick and accurate measurements with Meyer 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. Meyer's Class Z Gage Pin Libraries are now made to a closer tolerance (0.0001"), are more accurate, and are a better solution for your needs. The Class ZZ had a size deviation of 0.0002". The new Class Z has a size deviation of 0.0001". Features include... Class Z tolerance: 0.0001" Pins range in size from .0110" to .7500" 740 pc Library, .001" Increments Supplied with 4 Drawer Metal Cabinet GO - PLUS NO GO - MINUS 2" long 8 microinch finish or better Certificate of Accuracy or better Please specify PLUS or MINUS before adding to your cart.