A tool set for implanting bone screws in a human spine, followed by the implantationof a longitudinal connecting member into the bone screws includes a pair of independentlymountable and manipulatable elongate guide tools that form a unitary tool guidewhen desired. Each guide tool includes attachment structure for independentoperable connection of the guide tool to an arm of the bone screw. The bone screw/guidetool attachment includes an undercut and/or recess so as to resist separationof the guide tool member from an attached bone screw. A removable stabilizer cooperatingwith the pair of guide tools places such tools in a set spaced relation to one anotherwhen desired. Further tools include a cooperating bone screw driver with an attachedstabilizer, a closure starter/reduction tool, a closure driver and a countertorque tool.
