Fowler's Bore Gage Setting Master Kit without Gage Blocks is used for accurately setting any bore gage up to 6"/150mm in diameter to an accuracy of 0.0001"/0.003mm
Setting Device • Base anvil: 2.750" x 0.80" • Adjustable anvil 2.375" x 0.375" (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)