Blacken (sorrel) are considered weeds in agriculture and need to be removed from pastures, as they are scarcely consumed by cows and tend to spread. For this purpose, a tool called the 'Blackenstecher' is used. We have formally revised and given it a new design. Ergonomics and functionality were the focal points in the redesign, and the new design also optimized the production process. The new blacken iron is available at Landi.