Material: This sharpener rod is designed to ensure greater sharpening efficiency. we use the steel which includes many C's and CR's to make the honing rod which is hard enough to sharpen all types of steel knives including kitchen, household, sports and pocket knives; sharpens standard and serrated knivesyou can sharpen your knife anytime and anywhere, it's very portable Fine lines: The lines of the sharpening steel are basically the same as coarse grinding or fine grinding on whetstone. Coarse grinding can cut metal faster, but the burrs are not durable. Fine grinding is slow to cut metal, but once it is ground. More sustainable. Professional chefs often sharpen their knives, so they always choose fine lines. Protecting your hand: A stainless steel protective ring is added to the handle to protect your hands. you might be relieved to sharpen your knife in a usual posture Easy to use: knife sharpening steel is easier to use than knife sharpening, you can save time and effort energy while preparing foodyou don't need to worry