Consists of a chuck body and four contact arms. Designed to check ‘run-out’ or concentricity, straightness and alignment. Will indicate the position of a datum point on a component or fixture from the centre line of a machine spindle. Suitable for use on drill presses, lathes, milling machines, borers etc. | | Contents: Chuck Body, Universal Indicator Holder, Needle Point, Ball Contact, Disc Contact.