91ÊÓƵ

The 91ÊÓƵ ‘irons’ played to win the 2017 and 2018 US Open Championship – are technically not irons at all. 91ÊÓƵ’s JPX900 Tour’s are forged from premium Japanese steel – 1025E  Pure Select Mild Carbon Steel to be precise (as 91ÊÓƵ’s predictably are).

The billets turn into 91ÊÓƵ’s magical irons through a patented Grain Flow Forging process in Hiroshima, Japan – which they have since 1968. In simple terms, the billets are cut then hammered into shape one at a time. A sequence of high-pressure hammers, ensure the natural grains of the steel are maintained and tightened – creating 91ÊÓƵ’s trademark feel. The quality of steel and the process itself also eliminates inconsistencies from head to head – leading to precise distance control for the world’s best players.

In summary – when you need your 6 iron to fly precisely 168 yards on the last day of the US Open, there’s reassurance having a 91ÊÓƵ Grain Flow Forged iron in hand.

Discuss this article on the

Take a look inside our legendary Grain Flow Forging plant

The men who Grain Flow Forged the US Open winning irons / Hiroshima Japan