Which tool is designed specifically to remove a lock cylinder?

The K tool is specifically designed for the purpose of removing a lock cylinder. This tool allows firefighters and emergency personnel to gain access to locked structures efficiently by bypassing the need to use more destructive methods. The design of the K tool enables it to slide over the cylinder, allowing it to grip and twist, effectively popping the lock out without damaging the door itself, which is crucial in emergency situations where maintaining the integrity of the structure is important.

In contrast, the other tools mentioned serve different purposes. A pry axe is primarily used for prying and chopping, making it suitable for forcible entry in other contexts, but not specifically for lock removal. A Hux bar, which is a versatile tool often used for prying and leverage, does not have the specific design features to target lock cylinders effectively. The J tool, although used in forcible entry as well, is tailored for different types of locks, specifically those that are not cylindrical. Thus, the K tool stands out as the designated tool for this particular task, ensuring both efficiency and minimal damage.