Mulching flap

Regular blades will be fine as long as you are cutting a high RPM like it requires. When you wear those out then get mulching blades.
 
like "A" said, you can wait until the regular blades wear out; but, mulching blades will make clippings a whole lot smaller, and the lawn will look nicer without all the heavy rows of clippings. You decide.....
 
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