Fixation clamp

A fixation clamp for use in an external fixation system for holding bone fragments adjacent to each other with the help of fixation elements, comprising:

• a first and a second jaw member, each jaw member having a surface facing the other jaw;
• a central locking shaft extending through the first and second jaw members along a longitudinal axis;
• wherein the facing surface of at least one of the first or second jaw members comprise three and only three grooves, at least two grooves on the jaw member having a different cross-sectional size, wherein a longitudinal axis of each groove on the at least one jaw member lies in a plane perpendicular to the longitudinal axis of the locking shaft, wherein one groove of the at least one jaw member forms a cavity to accommodate a fixation element, wherein the longitudinal axes of the three grooves on the at least one jaw member form a triangle in the plane, wherein the first and second jaw members have a planar face parallel to the plane containing the longitudinal axes of the three grooves, an anti-rotation element extending outwardly of the plane of the face of the first jaw extends into a recess in the planar face of the second jaw member, the anti-rotation element and recess located within the triangle formed by the grooves, the longitudinal axes of the three grooves forming three angles totaling 180°, wherein a portion of the facing surface of one jaw located between the three grooves and the central locking shaft is spaced outwardly from a remaining portion of the facing surfaces to space the remaining portion of the facing surfaces apart.