There are many diamond cutting discs, but for cutting metal IMO bonded abrasive wheels are where it's at. All the diamond wheels cut too thick to cut quickly. This is the only diamond disc for die grinder I found that provides a grinding FACE, and I love it! This wheel mounted in an angle die grinder is far more surgical than the typical 4-1/2 wheel / electric angle grinder combo. Pretty aggressive, too. Leaves a rough finish, but you can't have both. I think it's much safer than a bonded wheel, too. I don't see how this thing could shatter and become shrapnel.
Rating: [5 of 5 Stars!]