Fixed to the light gauge in the factory and used. I am pleased to have you taught by the air piping company and use it. I think that it can be used for various applications such as hanging shelves and hooks other than original use. Although it is easy to install, when you tighten the M8 screw at the time of fixing, it will float from the overlapping surface so welding the mating surface with self-responsibility. Even if it floats, I think that there is no problem if you tighten it with a scroll bolt from the bolt hole, but when you use without using bolts, you can clamp very strongly when welding.