Abstract: An apparatus for the correction of scoliotic curvature of the spinal column. A Harrington distraction rod engages a concave side of the curvature of the spinal column and a Harrington compression rod engages a convex side of the curvature of the spinal column. A tensioning device engages the Harrington distraction rod and the Harrington compression rod so that the rods may be drawn toward each other or otherwise held in position with respect to each other. The tensioning device is comprised of a transverse threaded rod having a basket hook at an end thereof. The threaded rod engages the basket hook via a swivel connection which allows the transverse rod to rotate about its longitudinal axis within the basket hook. The other end of the threaded rod has a knurled end to facilitate handling.