Ping i Series E1 Irons reviewed and tested by independent reviewer Mark Crossfield PGA professional AskGolfGuru. Mark hits and tests the new Ping i Series E1 irons from Ping golf. See who this club might suit and what kind of golfers could benefit from its design. The E1 i Series Ping iron with its 341 steel and soft feel could be your next golf club that could help you lower your golf scores.