I just bought a 4.5" grinder with cutting in mind … the Dremel cutting wheels just go too quick.

So I get an AG452 (the display says 451), it comes with grinding wheel, wire wheel, and abrasive mop so I bought two metal cutters. I get home and start putting this together and it’s nowhere near tightening on the disc

I noticed it’s a Norton wheel, is there a Ryobi metal cutting wheel, that I’m not seeing, that will fit the way it’s supposed to?
on my grinder when i want to se a cutoff disk i have to flip the nut over and put on backwards for it to tighten.
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