Tab, tooling for the manufacture of the tab and method of manufacturing the tab

A tab to be affixed to a can end, the tab comprising:

• a nose portion located at a front end of the tab;
• a lift portion located at a back end of the tab;
• and a rivet receiving portion located proximate to the nose portion with a rivet hole, the rivet receiving portion being coupled to the nose portion, the rivet hole having a non-round perimeter with a first diameter portion and a second diameter portion, wherein the first diameter portion ends in a plurality of first arcuate segments on the non-round perimeter, wherein the second diameter portion ends in a plurality of notches on the non-round perimeter, wherein the second diameter portion is greater in length than the first diameter portion, wherein at least one of the first arcuate segments has an arcuate size which is different from an arcuate size of at least one other of the plurality of first arcuate segments, and wherein the rivet receiving portion is structured to resist rotation of the tab with respect to the can end.