What's this for?

I just got my K1C today, and I’m new to 3D printing. I don’t see anything in the manual for these items. Can you tell me what they are for?

  • Two blue plastic collar type objects and two hex screws in a ziploc baggie.
  • Rod with a ring on the end (maybe for clearing nozzle obstructions?).
  • Hex wrench, 6mm