Utility knives, also known as carving knives or wallpaper knives, are knives used for art and handicrafts. They are mainly used to cut softer things. They are mostly composed of a plastic handle and a blade, and are pull-out structures. There are also a few with metal handles. The blades are mostly beveled. If you use a blunt knife, you can break it along the line of the blade body, and a new blade will appear, which is convenient to use.
The following is a utility knife with a zinc alloy handle. The blade is generally made of 60 carbon steel. The better ones are made of sk2 sk5 material. The hardness of the blade can reach 58-62HRC. When it comes to hardness, I think of the time when I was in middle school and I used two utility knives to chop against each other. There will be many teeth on the blade. It is super easy to use the blade to saw the nails on the desk. I don't know if you have done it. This kind of knife has been used since the 50s and 60s. So far, there has been almost no change. Let's take a look at how it is made and how the blade is so sharp.