76mm cutting disc for metal and stainless steel, 10 pieces, maximum rotation speed 80m/s. There are 11 pieces, although it's a set of 10. I opened the package, but they are unused and have been stored. They are being sold due to the sale of the main unit. - Brand: Makita - Outer Diameter: 76mm - Inner Diameter: 10mm - Thickness: 1.0mm - Application: For metal and stainless steel - Model: A-74382 - Quantity: 10 pieces - Maximum Rotation Speed: MAX: 80m/s (4,800/min) Thank you for looking.