10PC Mixed Aluminium Oxide Abrasive Sandpaper Rolls Kit with 3/32" Mandrel, Includes Each 2PC Grit 240/400/600# and 1PC Grit 800/1000/1500/2000#, for Grinding and Polishing All Materials

I make jewelry and have a quick change foredom flexshaft handpiece. The 3/32 inch mandrel for these fits that handpiece which makes life easier. Most online jewelry suppliers do not carry a variety pack of these already loaded sandpapers and sell you 10 mandrels of each grit in a pack which can be a bit of an outlay of cash if you want to use a variety of grits as is proper for scratch removal and polishing. Though these are a bit smaller (slightly less sandpaper) than the ones from Rio they look very similar and are nicely marked with the grit on the tape at the bottom.

They work great. I use them to polish the inside of rings.