Materials:Diamond Grind Tungsten Carbide Inserts, Equipped with blades made from one of the hardest materials known to ensure years of reliable use. Long Service Life: The blade of a knife sharpener can be reversed, extending its service life. Garden tool sharpeners do not rust and are easy to clean with soapy water. Safe To Use: Equipped with a full-length guard to protect your fingers during sharpening. Suitable for right-handed and left-handed people. Easy to useDon't apply too much pressure to re-sharpen but if your blade is blunt, draw it across with firm pressure and you will feel it removing material and forming a new edge. Just two or three swipes, you can sharpen most blades like new. For Garden Tools & Kitchen Knives: Designed to sharpen all garden tools such as lawnmower blades, pruning shears, branch shears, hoes, shovels, sickles, etc. It can also be used to sharpen kitchen knives.