Rotary 15-10292 Lawn Mower Blades for John Deere, Set of Center Hole Dia: 0.80" Length: 18-7/8",Thickness: .204" Width: 2-3/4",3 blades for the 54" cut. Replaces : JOHN DEERE: M143520, WINDSOR: 50-4441, OREGON: 90-354, STENS: 330-489