This is a box of dozens of chuck keys (used to tighten chucks on drills and drill presses). The whole box came from the closing out auction of a machine shop, and I know the feeling. These things accumulate, and it’s good to have a box where you can always, eventually, find the one that fits the machine you haven’t used for a while.
Location: Box 17
Have you used this tool? Think my description is all wrong? Have a better example? Comment now with any thoughts you have about this tool!