Home Golf Tips For Driving DRIVER SHAFT FLEX TEST – DOES FLEX MATTER? REGULAR v STIFF v EXTRA STIFF DRIVER SHAFT FLEX TEST – DOES FLEX MATTER? REGULAR v STIFF v EXTRA STIFF Golf Pro May 03, 2019 comments off Tweet on Twitter Share on Facebook Pinterest DRIVER SHAFT FLEX TEST – DOES FLEX MATTER? REGULAR v STIFF v EXTRA STIFF See also Inci Mehmet & Andrew Coltart walk the BMW PGA Championship range & discuss the amateurs abilities