Golf Equipment »   How do you determine what kind of flex you need in a golf club?

If you are a moderate player 98 to 120, use a stiff shaft with a slow swing speed, if you are under control and playing below the hundreds, get a flex because the grip end of the club tend to produce lower launching, lower spinning shots. Flex points nearer to the club head tend to produce higher launching, higher spinning shots. More spin more distance, but wild draws and hooks...