Round with tapered end good for loop knives and knife hook sharpening. This diamond hone is commonly found when searching how to sharpen a knife. Diamond coated, the sharpening surface is cone shaped and tapers to a rounded point. Replacing the whetstone, these knife hones are very high quality and made in the USA. Use it to sharpen knives of any sort! This is a popular sharpening tool, knife sharpener. The rounded edge design on this knife sharpening tool allows for easy sharpening on the hook part of The Knife hoof knife or any similar knife. We sharpen thousands!