Check the listing for details. Water-Cooled Knife Sharpener Sharpening Machine Automatic Electric Belt Sander. Condition: New, Made in China. Listed at 119.82 USD. Water-Cooled Knife Sharpening Machine Small Automatic Electric Belt Sander Digital Display Speed Adjustable Knife Sharpener. Multi-functional belt sander for water/dry sanding. High quality cast iron body.