On Dec 2, 7:15*pm, " wrote:
That's an awfully small hole. If it was any larger, I would make a
hollow punch, like a leather or gasket punch,punch, and press it
through the rubber.

Paul

This is the punch set chemists used to punch holes in cork and then
rubber stoppers:
http://www.boekelsci.com/pages/produ...ro_lab_06.html

The bevel is on the outside so the cut plug doesn't jam. The conical
handled tool with the swinging steel blade sharpens the cutters. Soap
is a good cutting lubricant.

jsw