The Navistar 6.0 Sleeve Tap is used with the Guide Bushing448-6776-40(sold separately) to create threads in the old installed injector sleeve prior to using the Sleeve Removal Tool to extract the old sleeve.
This is part of a complete kit for Removal and Installation of both the Injector Sleeves and Glow Plug Sleeves. The complete kit isPart Number 451-6776-00