This document describes the features and injuries caused by different types of sharp weapons including knives, daggers, and swords. It explains that these weapons can cause injuries ranging from cuts, bruises, and abrasions to puncture wounds and bone fractures depending on whether the edge is sharp or blunt. The documents also notes that the nature of the weapon and the type of injuries it produces can provide clues about how it was used and the positions of the assailant and victim.