1. Anatomical reduction (intra-articular fracture), accurate reduction before screw implantation. 2. Stable fixation, with the accurate guidance of Kirschner wires, compressive fixation between fracture ends. 3. Preserving blood supply, simple operation steps, little soft tissue damage. 4. The exact fixed/stable structure allows early movement.● Titanium alloy material has better biocompatibility, and CT and MRI are compatible. ● The notch of the nail head is lower to reduce the interference to the surrounding tissue. ● Provide 1 / 3 thread, half thread and full thread design. ● Head self tapping and self drilling design, easy to operate and effectively shorten the operation time. ● Superior performance of the triangular blades makes it to implant and remove the screw easily. ● After insertion, it can keep compression function under periodic forces. ● Torx head can be better controlled and prevent skidding.