CORK BORER, Set of 6 (HEAVY Pattern) German Type (Export Quality) Strong Handles.

A cork borer is a metal instrument that is commonly used in chemical or biology laboratories to cut a hole in a cork or rubber stopper to insert glass tubing.   Cork borers are typically sold in a set of nested sizes, as well as a solid pin for forcing the discarded cork (or rubber) out of the borer. The individual borer is a hollow tube with a tapered edge and, in most cases, a handle at the other end.