The commonly used ones are open-ended set screws and flat head set screws. One end of the opening tightening screw has a slot, and the other end is conical. When using, align the slot with the threaded hole of the connected part and screw it in. The flat head set screw is directly screwed into the threaded hole of the connected part, and the relative position of the two is fixed by screwing in to an appropriate depth. The design of these screws allows them to withstand certain shear and tensile forces, ensuring a secure connection.