No, but when your drill breaks there's still plenty of potential for it to physically injure you in different ways. As mooreds said, the end user doesn't care h

No, but when your drill breaks there's still plenty of potential for it to physically injure you in different ways. As mooreds said, the end user doesn't care how you made the tool, they care that it won't go catastrophically wrong on them. How you accomplished that is not relevant.