With cutting edge technology, Tramontinas professional knives are always ready to jump into action and do beautifully well with any ingredient, cut, or recipe. All-around efficiency. The incredible high quality of the blades is a result of a thermal treatment which consists of hardening (heating the blade), subzero (cooling from 50 to -196 degrees), and tempering (increasing the steel elasticity) for a longer and more efficient life . The anatomical and ergonomic textured polypropylene handle, is directly injected into the steel bolster, ensuring a comfortable, safe use. The antimicrobial protection prevents and reduces the growth of bacteria and fungi. This technology is incorporated during the handle manufacturing process and lasts throughout the product’s life.