Okay, we admit it: they are neither sand, nor paper. But these pads have a diamond surface on a flexible sheet-metal backing and offer the most aggressive removal rate you can imagine! They are much faster than an impregnated grinding disc because they have 100% diamond exposure! These hook and loop backed pads can be used either wet or dry on a sander or grinder, and they operate well at any speed– and you will be pleasantly surprised at how long they last. Not only can you sand & finish with them, but they also work great for fabricating granite.