Idealeben Whetstone with Non-Slip Silicone Holder, Gray HIGH-QUALITY DOUBLE-SIDED KNIFE SHARPENING STONE: Coarse side 1000 grit leaves metal edge with frosted appearance. Edge sharpness equivalent to majority of factory edges on knives, tools; Fine side 4000 grit is ideal for finishing and polishing the edge, make edge very sharp, and edge reflects light well. Perfect for light touch-ups to an already sharp. HIGH-GRADE WHETSTONE ENSURE EFFECTIVE SHARPENING RESULTS: BearMoo sharpening stone is made from professional grade white corundum, corrosion-resistant, heat-resistant, edges and corners are clearly demarcated. 1000/4000 GRINDSTONE IS SUITABLE FOR MOST GRINDING OPERATIONS, such as kitchen knives, kitchen shears, pocket knife, Shun chef knife, porting knives, straight razor, cutting class knife grinding, precision tool, garden tools and art appliance, but EXCEPT serrated blades and ceramic knife etc. 100% SATISFACTION GUARANTEE NO RISK - We're sure you're going to love this whetstone, try it out today without risk. If you're not satisfied with the sharpening stone for whatever reason, just contact us within 30 days for a hassle-free full refund, no questions asked. GUARANTEE THE SAFETY SHARPENING WITH NON-SLIP SILLICONE BASE: The non-slip silicone base holds the sharpening stone securely in place, so you never have to worry about the whetstone slipping off the counter.