cork borer

When testing the water potential of a potato, a cork borer is used to maintain a constant surface area.

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

Cork borer is also used to punch holes on an agar plate, to perform Well Diffusion assays in microbiology to study Bioactivity.

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.

Cork borers are also used to take samples from living trees, for tree ring analysis (dendrochronology), and for taking samples for experiments when a constant diameter is required, e.g.

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.

Finally, the third type of experiment involved plug grafts, which were made by exchanging transverse plugs of stems cut with a 5-mm-diameter cork borer from an internode approximately in the middle of a 50-cm plant (Figure 1C).