Your search for "angle grinder" revealed the following:

3M™ Disc Pad Hub 45190, 4-1/2 in x 5/8 in-11 Internal, 10 ea/Case

3M™ Disc Pad Hub has an internal threaded metal insert that threads onto the shaft of a sander and grinder to hold a disc pad face plate and fiber disc in place.

3M™ Disc Pad Hub 86100, 4-1/2 in 5/8 in-11 internal, 10 ea/Case

3M™ Disc Pad Hub has an internal threaded metal insert that threads onto the shaft of a sander and grinder to hold a disc pad face plate and fiber disc in place.

3M™ Disc pad Hub 28476, 2-1/2 in x 5/8 in-11 Internal Low Profile, 10 ea/Case

3M™ Disc Pad Hub has an internal threaded metal insert that threads onto the shaft of a sander and grinder to hold a disc pad face plate and fiber disc in place.

3M™ Hookit™ D/F Disc Pad 82659, 5 in x 3/4 in 5/16-24 External 5 Holes, 10 ea/Case

3M™ Hookit™ Disc Pad securely holds a 3M™ Hookit sanding or finishing disc or 3M™ Finesse-it™ buffing pad for use with a hand-held sanding tool such as a rotary, orbital, or random orbital sander. The 45 degree tapered edge provides flexibility and allows the sanded area to be feather-edged or...