Ground surfaces are of hardened tool steel. Indicators AGD design. 100 Deg Angle. Directly reads the large diameter of the countersink. Includes set master ring. Includes set master ring.
Metric Reading Dial Indicator Countersink Gage, .05-4.3" Range, 0.05mm Grad, 100 Degree Angle. Starrett Countersink Gages are offered in three different angles so that the gage sets on the angular side of the countersink, as opposed to a chamfer gage which sets on the top edge of the chamfer. 0.5-4.3mm Range with Case.