The Knuckle Joint allows full 360° rotation of the knuckle, and 15° angular deviations, with internal pressure sealing throughout the full rotation of the tool.  The ball and socket of the knuckle provide the rotation and angular deviation capability of the Knuckle Joint, while seals in the body provide the sealing capability.The full flow through bore also allows the use of flow activated tools below the coiled tubing Knuckle Joint.  Multiple Knuckle Joints can be incorporated in longer tool strings.