Description Knuckle. Leveling box to lift arm. Massey Ferguson models using 3/4" offset. This item is a suitable alternative for the following: 180853M1, A-1884376M1, A-957E566, A1884376M1, A589846, 964434V1, A957E566, 964434M1, 957E566, 764655, 180853M91