double iron References double iron tool Ask Anything Homework Help Also known as: chip breaker, top iron Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: hand tool/ PlaneNow called the double iron, it is a feature of all but the smallest of modern planes. Read MoreNow called the double iron, it is a feature of all but the smallest of modern planes. Read More