The TOPS series uses the HD design, which means that the internal structure of the shaft is joined by 16 prismatic sections to form 16 angles.

The HD design uses a new structural strength adjustment of the shaft, and uses high-strength, ultra-heat-resistant, high-elastic UHN/UMN high-tonnage carbon fiber material as the main material.

It making the BUTT of the shaft stronger and the internal structure is very stable, can withstand huge forces a nd-enhance the Tip end of the force output fast.

The bevel cross mixing process in HD technology can also increase the inertia of the shaft at the same time and the center of gravity is better matched to the shaft head, thus achieving a more stable ratio of strength to center of gravity of the shaft.