What can be said about sanding belts? you are good they hold up well. They don't crumble. I put one on when I got it and I'm still using it 2 years later. (Yes, I've waited 2 years to write a review.) I've sanded a lot of wood, plastic, PVC pipe, and even aluminum. The aluminum stuck to the belt a bit, but it peeled off easily and I didn't do it too often.