It is written in Hebrew "ZaHaL" which means "I.D.F."
Also it is written in Hebrew and in English - Mossad.
On the back written in Hebrew traveler protection prayer (Tefilat HaDerech) - for safety on the roads/trip. It is a traditional Jewish prayer for a safe journey.
Material: metal
Size of pendant: 3.2x2.5cm/1.2x1inch . Length of stainless steel ball chain: 50cm/20inch.