We offer three different methods of attaching your floor mounted counter stool or your floor mounted table base. We offer a metal plate that has 8 holes to attach to the floor. This is Type A and our most common. We offer a threaded bolt that you attach to the floor using concrete. This is our Type C and our preferred method of connection. We offer type B for attaching to a floor with a basement. If you think you need this part, please reach out to us. It is unusual to need a new one unless you are moving the counter stools.