81PC SQUARE STEEL GAGE BLOCK SET (GRADE B)

� Each block with center hole threaded.


� Meet or exceeds U.S. Federal specification GGG - G - 15C.


� Complete with manufacturer's calibration.


� Made of the highest quality tool steel.


� Surface Hardness: HRC 64


� With sturdy fitted wooden case.
� With center hole.


� Offering N.I.S.T. Traceable Calibration


� All calibration conforms to:


� MIL-STD 45662A


� GGG-G-15C


� ISO/IEC 17025


� ISO 9000, 10012-1


� ANSI-NCSL Z540-1


� ISO GUIDE 25 Certified