Medical devices and apparatus for posterior cervical fusion of the spine, namely, preparatory and delivery tools for accessing, preparing, distracting and immobilizing spinal joints, delivery tools for distracting spinal joints, delivery tools for positioning spinal implants, spinal joint decortication tools, delivery tools for spinal joint grafting material; instrument kits for open, minimally invasive surgery, or percutaneous access of the spine comprising the foregoing; medical devices, namely, tools for decortication of spinal joints; medical devices, namely, tools for delivery of natural or artificial bone grafting materials; structural parts for all the foregoing; all of the foregoing excluding spinal retractors, spinal adjust length adjust keys and spinal exploration probe sets