AccusizeTools - Co-Ax Indicator 0-0.15" x 0.0005'' Graduations, Coaxial Centering, JD21-0001 Go to amazon.com Related posts How to buy the best axial indicator? DescriptionAll points and feelers includedLength of straight feeler: 1.77'', 4'', 6.06''Length of center point feeler: 2.07''Length of curved feeler: 1.81'', 4'', 6.06''Accuracy: 0.0002"