UST Mamiya ProForce Prime M40X Shaft Review
It’s tough to argue with the fact the UST ProForce line of shafts continues to get better and better every year. This year’s Prime M40X shaft isn’t just lighter than previous generations. It’s stronger too.
M40X material has proven to be a major breakthrough when it comes to carbon fiber technology. Developed by TORAY industries, M40X pushes the limits in terms of tensile strength.
What does this mean for golfers? More swing speed, increased stability, and longer shots with fairway woods and drivers.