Sharpens 45mm Rotary Cutter Blades. Instructions: Unscrew handles and place blade on screw of bottom handle. Screw top and bottom handles together. Hold sharpening disk in one hand, position blade directly onto abrasive disk and twist back and forth a few times. Use coarse side (beige) of sharpening disk to smooth damaged blade edges. Use fine side (gray) to sharpen dull blade to a razor-sharp finish. Sharpen both sides of blade equally.
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