The Easy-Opening End (EOE) contains a scored region and a pull tab that can be leveraged to open the hole (by pushing the scored region into the can).
The end is usually an aluminum alloy with magnesium. They are stamped out from a flat sheet and formed in a single operation. The pull tab is made from a similar alloy, and the tiny rivet that connects the two is made from a softer alloy. The EOEs are assembled before the end is attached to the can.
Pull tabs are either coloured or inkjet coded. The Pierce-Thru-Tab provides permanent non-erasable markings in the shape of logos, alpha-numeral, and symbols, functioning as excellent and effective promotional tools to promote brands.