MMC 4844A28 is a arbor bushing. If you search that number it will show you all the options to fit several sized wheels and shafts.
Thanks blinkspot! So close.. Sorry to keep asking these questions. I'm not really sure how this stuff works. I looked at the site and from what i can tell it says "Snap-in Arbor Adapter, Reduces 2" to 5/8"
The wheel that came with the grinder says it's 5/8 so we're good on that end..
but the new grinding wheel i have.. the hole measures 3 inches.
So am i correct that none of these will work?