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