Knife blades are the cutting parts of knives, designed to slice through various materials. They are typically made from metals like stainless steel or carbon steel, which provide durability and sharpness. The shape and size of a blade can vary, affecting its use in different tasks, such as cooking or outdoor activities. The edge of a knife blade can be straight or serrated, with each type serving specific purposes. For example, a straight edge is ideal for precise cuts, while a serrated edge is better for slicing through bread or tougher surfaces. Proper maintenance, like sharpening and cleaning, is essential for optimal performance.