The closing knife is a popular type of knife that is used all over the world and has a rich history. The history of closing knives dates back to antiquity, when the first closing knives were made by the Greeks and Romans. These knives usually consisted of a blade and a handle that could be folded for easier carrying. Over the years, the design of closing knives has continually evolved, with new mechanisms for locking and unlocking the knife. In the 19th century, switchblades became very popular in America, where they were used as tools for everyday work and as weapons in combat situations. At that time, they also began to produce knives with a fixed lock, which was very safe and reliable. Throughout the 20th century, folding knives became even more popular and designs became increasingly sophisticated. In the 1950s and 1960s, switchblades were popular among the hunting community and also among military units. In the 1970s, closing knives were also popular with skateboarders and the punk subculture. Nowadays, locking knives are very widespread and there are many different types of knives with different locking and unlocking mechanisms. Knives are used not only for work, but also as weapons and collector's pieces. In some countries, knives are regulated by law and may be banned or restricted to the public.

The Liner Lock is a knife locking mechanism used on locking knives. This is a type of locking mechanism that allows the blade to be held firmly in the open position by an internal locking mechanism that is activated when the knife is opened. This mechanism is made of a metal strip, located on the inside of the knife handle, which locks the blade in the open position to prevent the knife from accidentally closing during use. When you want to continue working with the knife, just press the locking element and the knife continues to work until you push it through and it is locked again. Liner Lock is a very popular knife locking mechanism and is used in many types of knives.