What are these artefacts my grandfather dug up, and how old could they be?

by LordFedorington

My grandfather was a farmer in Germany ca. 40 miles east of Hamburg. He dug up a lot of old and ancient stuff like swords and arrowheads. Most of that was donated to local museums after he died, but I still have the items in the photo:

https://imgur.com/a/0bCq8x6

What are they? For some the function is more clear than for others. How old could they be?

Thank you

Alexandrian_Codex

Curatorial staff at a local museum or university would probably be better equipped to provide a thorough and thoughtful analysis of these objects.