A system for manipulating one or more vertebra, the system comprising: a first bone anchor (60E; 100) configured to be connected to a first vertebra; a second bone anchor configured to be connected to a second vertebra; a spinal rod (90B; 12) configured to be positioned in a receiving member (62; 140) of the first bone anchor and in a receiving member of the second bone anchor; a first instrument configured to be connected to the receiving member of the first bone anchor; a second instrument configured to be connected to the receiving member of the second bone anchor; and a connector configured to be coupled to the first instrument and to the second instrument, the connector including: a first arm having a first end and a second end, a second arm having a first end and a second end, the first and second arms being movable relative to one another between an open position in which the first end of the first arm is separated from the first end of the second arm and a closed position in which the first end of the first arm is coupled to the first end of the second arm; wherein in the system: the first instrument is configured to be manipulated to rotate the first bone anchor and the first vertebra relative to the second vertebra, the connector is configured to be moved to manipulate the first instrument and the second instrument to rotate the first vertebra and the second vertebra relative to one another, and the receiving member of the first bone anchor is adjustable relative to a bone engaging shaft of the first bone anchor in a first direction and restricted from motion in a second direction. a first bone anchor (60E; 100) configured to be connected to a first vertebra; a second bone anchor configured to be connected to a second vertebra; a spinal rod (90B; 12) configured to be positioned in a receiving member (62; 140) of the first bone anchor and in a receiving member of the second bone anchor; a first instrument configured to be connected to the receiving member of the first bone anchor; a second instrument configured to be connected to the receiving member of the second bone anchor; and a connector configured to be coupled to the first instrument and to the second instrument, the connector including: a first arm having a first end and a second end, a second arm having a first end and a second end, the first and second arms being movable relative to one another between an open position in which the first end of the first arm is separated from the first end of the second arm and a closed position in which the first end of the first arm is coupled to the first end of the second arm; wherein in the system: the first instrument is configured to be manipulated to rotate the first bone anchor and the first vertebra relative to the second vertebra, the connector is configured to be moved to manipulate the first instrument and the second instrument to rotate the first vertebra and the second vertebra relative to one another, and the receiving member of the first bone anchor is adjustable relative to a bone engaging shaft of the first bone anchor in a first direction and restricted from motion in a second direction. a first arm having a first end and a second end, a second arm having a first end and a second end, the first and second arms being movable relative to one another between an open position in which the first end of the first arm is separated from the first end of the second arm and a closed position in which the first end of the first arm is coupled to the first end of the second arm; wherein in the system: the first instrument is configured to be manipulated to rotate the first bone anchor and the first vertebra relative to the second vertebra, the connector is configured to be moved to manipulate the first instrument and the second instrument to rotate the first vertebra and the second vertebra relative to one another, and the receiving member of the first bone anchor is adjustable relative to a bone engaging shaft of the first bone anchor in a first direction and restricted from motion in a second direction. the first instrument is configured to be manipulated to rotate the first bone anchor and the first vertebra relative to the second vertebra, the connector is configured to be moved to manipulate the first instrument and the second instrument to rotate the first vertebra and the second vertebra relative to one another, and the receiving member of the first bone anchor is adjustable relative to a bone engaging shaft of the first bone anchor in a first direction and restricted from motion in a second direction.