EX11224 Notched Hi Lift 20.5" blade replaces Exmark blade 103-6403, 103-6403-S notched mower blade with 15/16" center hole. Order (3) blades for Exmark 60" mower deck. Fits some Exmark Lazer Z 60" cut models. Refer to your parts manual to match by OEM#. 15-11224 is similar to Oregon blade 92-031, Stens 355-287, Sunbelt B1EM1880. 1036403S, 103-6403S, 1036403-S, air lift lawn mower blade.