ecarke 3" mini bench grinder compatible with dewalt 20v (tool only) bench grinder 2000-10000 rpm variable speed with ac adapter, dual grinding wheels for sharpen knives, drills, steel, rust removal yellow is up for auction in Tools & Home Improvement. The current bid is $13.00, 67% below the $39.99 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.