Knife Sharpening Sharpener Stone Whetstone Waterstone 1000 6000 Grit, Silicon Non Slip Base and Ebook Included For Kitchen Knives, Tactical Knives, Scissors, Razors, Swords and more The CWINDY whetstone is made of natural corundum, It has excellent features of self-sharpening. The whetstone is produced with 17 processes, and 3 inspection procedures to guarantee the quality. The low grit side is for refine the dull edge, the high grit is for the edge be sharp and polished. Suitable for almost all kinds of knives ,straight razor, precision tool, planer tool and chisels. Place the order without risk, ask us for a full refund if you are not satisfied with the whetstone.