The Matrix HD 6 shaft weighs in the range of 64 grams to 70 grams and has a mid spin rate. It also conforms to a low/mid launch. One of the most advanced shafts in the world, the Ozik HD 6 shaft is geared specifically for tour trajectory and distance.
HD in HD 6 stands for a Hexdecagonal internal platform that the shafts themselves are constructed on. Using an incredibly durable 16-cut butt section, the Matrix Golf HD6 has a stronger tip and structure without increasing overall weight.
The Matrix HD 6 shaft is more recommended for either those familiar with shafts in the mid 60s to high 60s gram class, who prefer a piercing trajectory.