FD209RM, FD209R, DHU1-1/8S-209 , DISC HARROW UNIT BCA/FEDERAL MOGUL: FD209R (RM)FAFNIR/TORRINGTON: DHU1-1/8S-209DIMENSIONS:BORE: 1-1/8" SQUAREBOLT TO BOLT: 5" (BOTTOM LEFT TO TOP RIGHT)