>I just am baffled how a sanding disk would attach considering its smooth an has nothing to atach to. Anyone know how it would atach?
Adhesive, made just for that purpose, designed to not make too much of a bond, so you can peel it off when the sand paper wears out.
When you get *really* lazy, you buy your sandpaper pre-sticky:http://3mcollision.com/products/abrasives/discs?aad_attachment_method=161