Troy Bilt Chipper Knife 2 Blades for Troy-Bilt 742-0544, 942-0544, 742-0544A, 942-0544A 742-0653 Part numbers: 742-0544 942-0544 742-0544A 942-0544A 742-0544B 942-0544B 742-0653 Includes fasteners 2 New Blades / Knives for Troy-Bilt/MTD Chipper 160830e472833