"GAGE,UNIBALL RADIAL WEAR;MATL STEEL FRAME W/DIAL INDICATOR,LG 5.19 IN.,WIDTH 1.0 IN.,HEIGHT 3.25 IN.;MEASURES RADIAL PLAY IN UNIBALL BEARINGS WITH 0.250 IN. DIA. I.D. BY HOLDING THE OUTER RACE SECURLEY AND MOVING THE BALL RADIALLY,MEASURING THE MOVEMENT ON A DIAL INDICATOR"