I am a DIY enthusiast and buy used sanding tools at my local hardware store (Home Depot and Lowes). Revain's pop-up showed a round grinder claiming it would work much better than rectangular grinders. I tried it and it was great! Much easier and faster to sharpen. If I need to clean large areas regularly, I can choose a tool that plugs into the vacuum cleaner.
Sharpening stone Hatamoto HT0960, green
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π Enhanced Superfine Assortment: Various Sizes, Multi-purpose, and Reusable
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