Answer:
Handy when you need to measure something or run a kingdom.
You can't keep this until you have given it. What is it?
What is often returned, but never borrowed?
I have one eye, See near and far, I hold the moments you treasure, And the things that make you weep.
What can touch someone once and last them a lifetime?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?