Fowler 73-646-000-1 Inch Bore Gage Setting Master Kit

Used for accurately setting any bore gage up to 6"/150mm in diameter to an accuracy of 0.0001"/0.003mm Base anvil: 2.750" x .80" Adjustable anvil 2.375" x .375" (two each) Internal capacity: 6"/150mm Depth capacity: 1"/25mm Centralizer capacity width: 2.625"/66.7mm Quick-release holder for fast adjustment. Can also be used of external setting, depending on application (external mics, snap gages, caliper gages) Economy Gage Block Set 36 piece set, Tolerances to ±.00005" with Certificate of Calibration to N.I.S.T.