7/8" hex bore. For seed drive line on John Deere 7200 Wing-Fold, 7200 Flex-Fold, 7300 Vertical-Fold, 1710, 1715, 1760, 1760NT, 1765, 1765NT, 1770, 1770NT, 1775, 1775NT, 1780, 1785, 1790, 1795, DB series, DR series planters.
3/4" hex bore. For driveline shafts and transmission on Massey Ferguson, White 5100, 5700, 6000, 8000, 9000 (except 6200, 6300 Rear Fold) planters. For seed and fertilizer transmission on Deutz-Allis 385; Landoll 4400 planters.