I use it for initial polishing of silver items in jewelry. I use these in a Foredom Foredom TX Flex Shaft, SXR Foot Pedal 115v 1/3 HP, 15,000 rpm flex shaft system. For my application they work great. In my use they are very durable. To get a good finish, you need to start with coarse sanding and work your way up to finer grits.