Yes , just like regular mowing blades.

Even more than the regular blades in my opinion. The mulching cap keeps the grass inside to be cut over nd over again thus producing more wear. I look at the grass I just cut and when it starts missing blade of grass and leaving some uncut I pull the blades and sharpen them.

Actually Tomplum whips me for over sharpening mine Roflmao !

You have an interesting social life.