Yosoo Sharpening Stone,1000 Kitchen Water Stone Knife Sharpener Dual/Double-Sided Whetstone Sharpener Suitable for top grade kitchen cutter, outdoor knife, precision tool. Special proportioned white corundum made Waterstones, high hardness and wear proof. Fine texture and sharpening force ensure sharpening speed and quality. Silicone anti-slip stand, beautiful and environment friendly. The most important point is its non-slip feature, ensuring safety during sharpening a knife. Easy to control Same sell on Amazon.com, too expensive! Factory outlets much cheaper than others!