Hhip 44000013 2 Piece Test Indicator With 0.0005" Resolution And Indicator Holder, 0.03" Universal test indicator Holder has 1-7/8" clamping diameter Length from center of clamping bracket to indicator: 6-1/2". Holder fits Bridgeport "J" head The indicator Has a precision pivot bearing and a satin chrome finish The indicator has a 0.098: contact point and 2 stems that are 7/32" and 1/4" The indicator has jeweled movements and automatic reversing