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[* black] Sharpen the blade with a file or with a grinder. Follow the angle that is already established and move the file along until the edge becomes sharp.
[* icon_caution] Be carful when checking for sharpness. You can very gently run your finger along the edge to check.
-[* icon_note] The blade does not to be as sharp as a razor blade. Try to make it as sharp as pair of scissors. Your lawnmower manual might give you specific details.
+[* icon_note] The blade does not need to be as sharp as a razor blade. Try to make it as sharp as pair of scissors. Check the lawnmower for specific details.