This is the very tough, medium soft Roloc Foam Pad Disc Holder. The holder is hook and loop to grip your 2" sanding discs. Five of these come in the Ultimate Sanding Kit, but now you can purchase these as replacements or extras for your kit separately. Perhaps you would just like to try one of these and purchase a mandrel with stem before committing to an Ultimate 2" and 3" Sanding Kit. Either way these holders are very sturdy  and will give you a lot of service.