A clamping assembly for an external fixation system, comprising a clamp body having an opening for receiving a bone fixation member； a pivotably rotatable locking arm associated with the clamp body, the locking arm being configured to provisionally hold the bone fixation member inside the opening of the clamp body； and a cam arm coupled to the locking arm, the cam arm being pivotably rotatable towards the clamp body to definitively hold the bone fixation member inside the opening of the clamp body.
