The knife butter by Atmosphera has a rounded edge and is not used for cutting, but for spreading. Its shape makes it ideal for spreading butter, jam, cream cheese, and other similar ingredients without damaging your bread. It is made of stainless steel, a popular material for knives, it is particularly durable and does not corrode. It is a combination of carbon and iron as a base, and chromium is added to repel stains and give the blade a glossy finish.