Cork borers usually come in a set of nested sizes along with a solid pin for pushing the removed cork (or rubber) out of the borer.

A cork borer, often used in a chemistry or biology laboratory, is a metal tool for cutting a hole in a cork or rubber stopper to insert glass tubing.

The wood boring types generally favor dying or dead branches on otherwise healthy trees, while a few types attack green wood some of these are serious pests capable of killing trees and causing major economic damage, such as the invasive emerald ash borer.