The Allure of Old Iron: The Era of Black Rust Steel Axe: A Mountain Worker's Amulet The three or four lines found on traditional Japanese axes are said to have a meaning, as an amulet to protect the body (mi) and avoid harm (yokeru). Total weight: Approximately 5 kg or more This is not a practical item, as it has not been sharpened. It was used to test the viscosity of natural whetstones for swords. Some axes can be used practically if sharpened and a handle is attached. Please refrain from purchasing if you are overly concerned about the condition, as this is an antique item.