What nonsense from FF. GROUP discs. Difficult to find. We cut thin sheet metal bars (and you can cut them with tin snips) for electrical installation... and these discs wear out immediately. Especially if you grind them, you can see the disc reducing by 1 centimeter in 3 seconds, and it throws small pieces at you and around you all the time. Completely fake. Each bar we cut required a disc change. We were using 5 discs per day. Meanwhile, the DeWalt discs we usually use last for days, each disc, without all the problems that FF. Group has. Another day, with 1 DeWalt disc, we installed bars on 8 floors (and still had a little disc left to cut for another floor...) and then with the FF. Group discs, we needed almost 1 disc per floor.