This is a Hammer Pendant.
The original was made of Silver and was found in the Holt in Norfolk, UK.
The Replica is near enough 1:1 in scale.
I have not yet received my copy of this and so I cannot vouch for its quality or suitability for purpose - but I will update this description when I have confirmed all is right and well.
More on the Original find can be seen in the PAS Article, Linked here:
https://finds.org.uk/database/artefacts/record/id/553540
I Have made it available in both Polished Brass and Polished Bronze and Polished Silver, but also In Plastic so that you may organise your own casting of the item which may work out cheaper.