Cut Disc 7 'X 1.6Mm X 7/8' Metal-Stainless Steel Ceramic Abrasive Grain 60 Hardness R Type 1 Or 41, Cutting Disc 4 1/2 'X 1.6Mm X 7/8' Metal-Acerero Stainless Beatery Ceramic Abrasive Grain 60 Hardness R