Shop 92 2 inch grinding disc at Northern Tool + Equipment. Oregon Chain Sharpener Replacement Grinding Wheel — 1/8in. Thickness, For 1/4in.-Pitch, .325in.-Pitch (33, 34, 35 Series Chains Only), Mini 3/8in.-Pitch (90, 91 Series Chains Only)Aluminum oxide powders having a high α proportion, crystallite sizes of approximately 0.1 μm and narrow …