Need to cut through metal fast and clean? These PFERD PSF cut-off wheels are workhorses. They're 7 inches in diameter, super thin at .045 inches thick, and have a 7/8 inch arbor hole to fit most angle grinders. They're made with Aluminum Oxide A abrasive, which is perfect for cutting stainless steel (INOX), carbon steel, and other ferrous metals. The thin design means they cut quickly with less burr formation and generate less heat, which is better for the material you're working on. They're rated for a max speed of 8600 RPM. This is a pack of 25 wheels, which is great value if you do a lot of metal fabrication, automotive work, or general shop projects. PFERD is a trusted name in abrasives for a reason – these wheels are durable and get the job done.