Mitutoyo 611303-551 0.0625", RECT, STEEL, AS-2Precision gage blocks are the primary standards vital to dimensional quality control in the manufacture of parts Mitutoyo offers a complete selection of gage blocks available in a choice of rectangular or square, metric or inch and steel or CERA (ceramic) types Provided with inspection certificate This grade is used within an inspection area to verify the accuracy of plug and snap gages, as well as for setting electronic measuring devices