Patent ID: 8679117

Claim:
A system for fixing a wire to an external fixator element, said system comprising: an external fixator element having a clamping surface and at least one opening extending from said surface, a wire adapted to extend through bony structure and to be fastened to said surface, a bolt having a shaft extending along an axis which shaft comprises a threaded section, a head section and at least one clamping element wherein said bolt is adapted to extend through said external fixator element opening and said at least one clamping element accommodates and clamps the wire to said clamping surface with a clamping force, a nut to pull said bolt against said clamping surface the external fixator element with said clamping force, and a counter torque tool engagable with the bolt to provide a counter torque while fastening said wire with said bolt and said nut to said surface, wherein said bolt comprises a counter torque opening and wherein said counter torque tool comprises a bolt section which is adapted to engage into said counter torque opening of said bolt, and wherein said counter torque tool bolt section has a cross-section which is complementary to said counter torque opening, wherein said counter torque tool comprises at least one opening through which a part of said wire extends.