BOTTLE CAP-Vintage Collection: Hole Punch. This tool has been designed specifically for punching holes in the edges of bottle caps. It creates holes that are 1.8mm in diameter and the overall length of the tool is 5-1/4 inches. Cushioned grips make it easy on the hands and it comes with an extra punch blade that can easily be replaced with the turn of a nut. Each package contains one Hole Punch and one replacement punch blade. Imported.