Welcome to the Steel Pentagon. The Steel Pentagon is an idea, based on a pre-defined number of attributes to build a club with a specific DNA structure at its core. Many football clubs will tell you that they are built on a number of values, but one club stands out above the rest as this being a true statement. Millwall Football Club. There are a number of differing opinions about the club from South London, some of them are negative, some of them are positive, here, I will only focus on the positives. There are 5 key attributes that any player must demonstrate if they are to be accepted by the fans and the dressing room.