Answer:
Each of these ends in a kettle full of precious metal and the double variety is quite awesome
What goes in, but never through? I've got some and so do you. We might lend one, or even two, but only if our trust is true.
When Iām metal or wood, I help you get home. When Iām flesh and Iām blood, In the darkness I roam.
What relies on columns but isn't a house, and asks for help but can't speak itself?
A hole in a pole, though I fill a hole in white. I'm used more by the day, and less by the night.
All about, but cannot be seen, Can be captured, cannot be held, No throat, but can be heard. Who am I?