It is made of steel sheet. The nut increases by distributing the pressure. There are special screw / nail holes in the mold release that allow the mold to be detected if desired so that it does not fall off once the stud is removed.
It is made of steel sheet. The nut increases by distributing the pressure. There are special screw / nail holes in the mold release that allow the mold to be detected if desired so that it does not fall off once the stud is removed.