Quality and durability for hardworking professionals. With cutting-edge technology, Tramontina's professional knives are always ready to jump into action and do beautifully well with any ingredient, cut, or recipe. Efficiency all-around. 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 on the steel bolster, ensuring a comfortable, safe use. The antimicrobial protection prevents and reduces the growth of bacteria and fungi.