"GAGE,TWIST;6.0 IN. LG BY 2.5 IN. WD BY 4.5 IN. HT;3.5 LBS;RQRD TO MEASURE THE SHROUD TWIST OF THE FIFTH STAGE LOW PRESSURE TURBINE;C/O YOKE BASE THAT ATTACHES TO A CHECK AND CORRECT FIXTURE,SPRING OPERATED SLIDE THAT HOLDS A DIAL INDICATOR,STABLE LOCATOR,SPRING OPERATED LOCATOR AND A PLASTIC STORAGE CONTAINER"