"MASTER,SET RING;STEEL RING SECURED IN PWA71411;HAS RUN-OUT DIAM. USED TO IND FIX TO CENTRALIZE ON HORIZ OR VERT LATHE;ACCOM. SET UP OF FIX FOR MACH 9TH THRU 12TH STAGE COMP AIR SEAL FRONT O.D. SNAP DIAM. BY LOCATING IN I.D. OF PWA71417 ADAP.;15.7 IN. L;15.7 IN. W;1.0 IN. H;10 LB;USED W/PWA71411 AND PWA71417;SERD 7684, F33657-94-C-0031"