Stiletto

A stiletto, also known as a stylet is a slender dagger used for piercing leather and plated armor, and mail such as chain mail.

Description
The slim blade of a stiletto is triangle or square in shape and ends in a sharp point.

History
Many cities prohibited the use of stilettos because they could be easily concealed on the body, such as one used by the bandit known as Shadowhawk who operated within the King's Forest in 1335 DR.