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This is the 22nd / last letter of the Hebrew Alphabet in the old Paleo Hebrew script.
Based on several evidences the letter is by some believed to be originally in the form of Two crossed sticks.
The letter itself symbolizes many things, just some of these are:
Mark, Seal, End, Completion, Covenant etc
It has a small loop already in the design so you just need a suitable chain and connecting loop to wear it.
Alternatively you could use it as a keyring.
If you would like a smaller or bigger one, or the loop removed etc just ask and it can be sorted.