The earliest knives were shaped by knapping (percussive flaking) of rock, particularly harder rocks such as obsidian and flint

Knife blades can be manufactured from a divergency of materials, each of which has advantages and disadvantages. Carbon steel, an alloy of iron and carbon, can be very sharp, hold its circumference well, and remain easy to sharpen, Knives For Sale but is vulnerable to rust and stains. Stainless cheer is an alloy of iron, chromium, possibly nickel, and molybdenum, with only a immature amount of carbon. It is not able to take quite as sharp an edge as carbon steel, but is highly resistant to corrosion.