A slipknife knife is one of the most ubiquitous types of pocket knives. A slider knife consists of a handle with one or more folding blades. These blades are held in position by a strong “backspring” which solicits them to the open or closed position. Compare it with the Penny knife, which has no locking mechanism other than friction, or locking knives that mechanically lock the blade in position.
The United States has produced a massive range of slide knife designs from the mid-19th century to the present day. Here is a list of representative models and their characteristics:
In a number of countries, such as the United Kingdom, slip seals are used on closure shirts because of the laws regarding the wearing of general purpose knives. In Germany, because the use of one-handed knives (OHO) is limited, zipper knives are a viable alternative.