Material: This sharpening steel is designed for optimal sharpening efficiency. Made from cerium-rich steel and calcium chloride, it is hard enough to sharpen all types of steel knives, including kitchen, table, sport, and pocket knives. It sharpens both smooth and serrated blades, allowing you to sharpen your knife anytime, anywhere. Additionally, it is very portable. Fine grit: The grit size of this sharpening steel is similar to that of a whetstone, whether coarse or fine. A coarse grit allows for faster cutting, but the edges are less durable. A finer grit, although slower, provides better durability. Professional chefs sharpen their knives frequently and therefore prefer a fine grit. Hand protection: A stainless steel protective ring has been added to the handle to protect your hands and allow you to sharpen your knife comfortably, even in a comfortable position. Ease of use: A sharpening steel is easier to use than a knife sharpener. You save time and energy when cooking, with complete peace of mind.