Final answer:
The instrument you're holding, with two sharp sides, a rounded back, and a rounded point, appears to be a knife, possibly a safety knife.
Step-by-step explanation:
Given your description of an instrument with two sharp sides, a rounded back, and a rounded point, it seems like you're holding a knife. The sharp sides of the instrument indicate the blade of the knife that is used for cutting or thrusting. The rounded back is often a feature in many knives to provide a safe surface to apply pressure. The rounded point could imply this is a type of safety knife, which may have a rounded or blunt point to reduce chances of accidental injury.
Learn more about Knife