Bacardi 151

Set of cork borers. Left to right sizes 6,7,8,9 nested, size 5, American penny for scale, sizes 4,3,2,1 nested, pusher. Background is 1/4" square graph paper.

In a chemistry laboratory a cork borer is a metal tool for cutting a hole in a cork or rubber stopper to insert glass tubing. 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. The individual borer is a hollow tube, tapered at the edge, generally with some kind of handle at the other end.

A separate devices is a cork borer sharpener used to hone the cutting edge to more easily slice the cork.

Cork borers are also used to take samples from living trees, for tree ring analysis.

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