We used these to clean up a lot of pans and it's our go to with getting gunk out of our cast iron. They work well, but they do rust which means they have a higher than expected iron content. Great product manufacture by WBM.
Great for cleaning dishes and scouring bottom of pots. I've been using my first pad for over a month (pad is stainless and easy to clean so I'm not worried about bacterial or mould build-up). It does a great job cleaning the bottom of pans, I've rejuvenated several pans I could not clean any other way, I was considering sandpaper they were so bad.