AccuRemote CO-AX COAXIAL TEST CENTERING INDICATOR COMPLETE SET For quick centering on milling and boring set-ups Includes 6 Feelers: 4", 8", 12" Straight 4", 8", 12" Curved Measuring Range: Internal: 5/32" - 4-1/4" External: 0 - 4-1/4" Locating Accuracy is 0.0005" of center Furnished in a fitted wood case