A penknife, or pen knife, is a small folding knife. Today, penknife is also the common British English term for both a pocketknife, which can have single or multiple blades, and for multi-tools, with
A simple penknife
A 16th century depiction of using a penknife on a quill
The Swiss Army knife is a multi-tooled pocketknife made for the Swiss Army since 1890, with consumer versions made, particularly since 1945. The term "Swiss Army knife" was used by American soldiers a
Penknife
…During the 20th century there was a proliferation of multi-function pocketknives with assorted blades and gadgets, the most famous of which is the Swiss Army knife, referred to in British English as penknives. A larger folding knife than a penknife, especially one in which the blade locks into place as a protection…
Victorinox "Huntsman" Swiss Army knife, with knife chain and belt clip
Wenger "EvoGrip S17" Swiss Army knife. Since 2013, the knives of Wenger are integrated in Victorinox.
Modell 1890, the first Swiss soldier knife produced by Wester & Co. Solingen
The Victorinox SwissChamp consists of eight layers with 33 functions and weighs 185 g.