MTD Genuine Parts Ball Joints - Tractors 1997 and After Replacement tractor ball joints Fits all lawn and garden tractors, 1997 and after For Troy-Bilt, MTD, Yard-Man, Yard Machines, Huskee and Bolens tractors Contains two ball joints Replaces O.E. # 923-0448, 923-0448A, 723-0448 and 723-0448A Includes Two Ball Joints (923-0448A)