We offer a range of round base flanges to fix vertical uprights and posts into concrete. The fitting comes with a single bolt hole that is located in the center that protects as well as hides the bolt. It is used when a tube fitting has to run through it. It is ideal for positioning structures. Thanks to the shape and structure of the base clamp, it can be fit easily at a 90° angle without a hassle. However, it is not advisable to use the base clamp for railings and stairways.