In a profession where precision is fundamental, it could not be achieved without the correct fasteners. That is why the articles presented here are so important in every work table.
If you want to make an engraving with the buril on a ring of about 2 mm. thick, if the idea is to hold the ring with one hand, while dangerous, it can be a complicated activity. Imagine what can happen if the donkey escapes, the accident is guaranteed. It will always be better to use an engraver screw to avoid any problem, it will also fit easily to the shape of the piece you wanted to place.
There will be cases in which it will be necessary to hold pieces with a greater force for which the steel grommets that offer greater pressure on the pieces to be fastened are essential.