Eetrite ceramic knives are made of zirconium oxide - considered the very best existing material for knives. The razor sharp ceramic blade easily retains it's original sharpness for more than 10 times longer than a stainless steel blade. With their hygienic, no-allergenic, corrosion resistant blade, our knives are ideal for healthy food prep in the home. Another advantage of ceramic knives is that they do not oxide food, thus fruits and vegetables do not turn brown when cut. The ceramic blade is non porous, so when cleaned properly there will be no food residue. This prevents cross contamination when dealing with allergies.