A stiletto is a short knife or dagger, with a long slender blade of various designs. This dagger is primarily a stabbing weapon, its narrow shape ending in a rigid pointed end allows it to penetrate deeply. It is not suited for cutting, even with edged examples. A typical early stiletto was a one piece cast metal handle and blade, that was then hammer forged in a "V" groove anvil producing a triangular blade cross section without any sharpened edges. Other examples have round, square and diamond cross sections. The word stiletto may sometimes be used in American English to refer to a switchblade or to a type of high-heeled shoe. Stiletto may also be used specifically for a knife exhibiting the same triangular cross-section and hollow grind as a small sword.
The stiletto was also favoured amongst assassins because it was an easily concealed weapon. This tactic occurred repeatedly, from the Zealots of 1st century Judaea, to the Venetians and the Assassins of Alamut.
World War I created the need for stilettos, several versions were made by all countries often grouped together in one class nicknamed the trench knife.
World War II saw a resurgence of the stiletto style in the form of several variants including the, U.S. Marine Raider Stiletto, Fairbairn-Sykes Fighting Knife and V-42 combat knife. However it should be noted that since these weapons can hold a cutting edge they are not true stilettos.