Can the stainless steel hexagon expansion screw be disassembled after installation?

To remove the expansion screw, first remove the nut, then knock the screw into the wall with a hammer, and then pull out the iron sheet outside the screw with pliers. After pulling out the iron sheet, clamp the screw with pliers and pull it out while shaking. Knock it up and down with a small hammer, shake it a few times and take it out easily. Some are very strong, but they still can't be pulled out. Cut some points around them with a chisel, and then pull them out while turning. If they still can't get out, use a 6 mm electric hammer drill to drill directly, the depth is not lower than the depth of the screw, then clamp the outer ring with pliers and pull it out while turning, so that the most stubborn one can also be pulled out.