How to use the charm of protection etc. Cant be used in anyway.

It's an armor mod.

It says what slot it goes in in the tooltip. Place a chestplate in the armor mod table first and then put the charm in the head slot.

Thank you for your response. I know it is an armor mod but the slots dont accept the charm. Should I install some other mode for inevntory?

Okay I saw the armor modification table right now. Thank you so much for your kindness. Have a good day.