This Kabbalah bracelet is made of Sterling silver and leather. The closer is a silver Star of David with two gemstones, Turquoises and Onyx. The bracelet is put on by attaching one end - the Star of David - to the other end which is a silver plate engraved with Ben Porat Yoseph Alei Ayne in Hebrew.
The phrase Ben Porat Yoseph Alei Ayne is taken from the book of Genesis. When Jacob blesses his youngest son, he calls him Ben Porat Yoseph, which means a fruitful son (Genesis, 49:42). Since Joseph is considered righteous in Jewish tradition, it has become a custom to use his name as a virtue for blessing and protection.