Oregon 198-058 100 Series Lawnmower Blade, Black Length: 19-5/16" thickness: 0.149" width: 2.75" center hole: 5/8" 6Pt star air lift: 1-1/2" Replacement for MTD and Bolens branded Tractors and lawn mowers Requires 2 blades for a 38" cut Maximum mulching length Replaces Bolens part numbers: 742-0610, 742-0610a, 942-0610, 942-0610A, gw-7420610, 942-0654, 742-0654, oem-742-0610, 742-0610a-0637