All sandpaper is not created equal. As a result, we love Mirka paper. The backing is beefier than other papers, and to us, that means quality. Aluminum oxide grain is the choice of most woodworkers because it's sharp, durable and, best of all, long-lasting on the higher paper grades that won't shred on the edges. This assortment is perfect for professionals, homeowners, and hobbyists because it includes everything from stock-removing 80-grit to a nice 220 finishing grit. Yes, you can spend less on other sandpapers, but you'll end up spending more in the end. This is quality