(1) hard design: reduction of soft tissue and articular surface of the bowel, especially for intra-articular fractures
(2) Hollow Design: Suitable for minimally invasive
(3) Full Thread: during fracture healing, fully threaded screws when subjected to cyclic loading can better maintain its compression function;

fracture surface position throughout the entire scope of the screw length.
(4) the gradient pitch thread: Screw from head to tail, pitch drastic change from a small screw into the bone of the head of the screw tail faster

than the speed, so that when the screw propulsion compression fracture surface