As noted above and shown in pictures, the very top bolt head for tightening tool in cylinder is rounded. I was able to use a vise grip to tighten. Otherwise, I did not see any significant performance issues.
Snap On, Snap-on Tool Toolbox Key Roll Cab Key Tool Chest Key 597, K597 For Lock
Snap On, Snap-on Tool Toolbox Key Roll Cab Key Tool Chest Key Y221, 221 For Lock
Snap On, Snap-on Tool Toolbox Key Roll Cab Key Tool Chest Key Y134, 134 For Lock
Snap On, Snap-on Tool Toolbox Key Roll Cab Key Tool Chest Key K618, 618
Snap On, Snap-on Tool Toolbox Key Roll Cab Key Tool Chest Key Y304, 304 For Lock
