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[DavidR8]

I was all set to order and noticed that they have a 7/8" arbor hole. All my 4.5" grinders have 5/8" arbors.

 

[DAT510]

Many angle grinders have reversible "stepped" washers that allow for both sizes. That's the way my 2 HF one's are.

Below is an example of the HF instructions for mounting 5/8 and 7/8 disks.

 

[DavidR8]

Doh! of course they do... Thanks @DAT510!