To sharpen the blades on your Ryobi hedge trimmer, file using a push forward technique. Finish off any excess with a whetstone, and then apply WD-40.
Say Goodbye To A Dull Ryobi Hedge Trimmer — Try These Sharpening Tips

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To sharpen the blades on your Ryobi hedge trimmer, file using a push forward technique. Finish off any excess with a whetstone, and then apply WD-40.