I filed the coating off and gave them a very sharp cutting edge.

Works pretty well. I bought a used riding mower and swapped out the blades with these. I cannot say if or how much better they would work than the OEM blades since the ones I took off were about as sharp as a rubber eraser and very bent and dented. Also they did come with a paint like coating over the entire blade including the cutting edges. I filed the coating off and gave them a very sharp cutting edge. Over all I like them and would but them again

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