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We have arranged eye hook screw, metal shield and expander cone. Now, we need a wire to tie the assembly together. I saw a twisted metal wire in the disengaged assembly.
So, I coiled it around the expandable screw assembly as shown below.
As we can see from the image the metal ring is tightly coiled around the center of screw assembly. This metal ring which behaves as a spring holds the sleeves together during the expansion and contraction.
Let’s have a final look at the design we developed using the basic working of expandable screw assembly.