A coupling-bolt for treating crus fracture with accompanying syndesmosis rupture comprises the metallic rod with the sharpened end, the screw, and the nut at one end and the head with the groove for the screwdriver at the opposite end and two flat metallic washers at both ends, and one metallic movable washers at each end of the rod designed as the disks with the split segments turned back oppositely at the same distance. .
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