Manual drill for plugs
Piercing the cork or rubber plugs used to close the laboratory containers or connect them to each other.
Set of hollow brass cylinders, placed one inside the other and crossed by a rod with a cover screwed on one end. Each of them has a sharp edge at one end and a pair of perforations at the other.
We continue the process until we get through the plug and, finally, we introduce the rod inside the cylinder, pushing to remove the accumulated debris.