Knives and multi-tools with slip-joint lock

Slip-joint

— a kind of knife locks that do not provide rigid fixation of the blade. In the open position, the blade in such a knife is fixed by the so-called spacer — an elastic element that is somewhat similar to the back lock "rocker", but does not enter into a hard hook with the blade (and also plays the role of a kind of closer for not fully open blade). To close such a knife, it is enough to apply some force to the butt. "Slip-joints" are used mainly in small Swiss knives that are not designed for high loads.