A bone fixator apparatus has rings and turnbuckles connectedto opposite sections of each ring via opposed right and left handed screwsmounted to the rings so that rotation of each turnbuckle modifies a distancebetween corresponding sections of the rings. On each ring, positioning leversare connected to each screw and mounted on respective sections of the ring.Each positioning lever is movable between an unlocked state allowing thescrew to move in relation to the ring and a locked state preventing a movementof the screw. Tensioning levers are mounted on opposite ends of each ring.Each tensioning lever is actionable between an unlocked state allowingmounting one end of a wire to the ring and a locked state causing the end ofthe wire to be securely attached to the ring. Any tension applied to the wireismaintained by action of the tensioning levers.
