ok here goes a bit more info for those that dont know what its about :
The Hamsa or Khamsa (Arabic: ????, Khamsa, literally “five”, Hebrew: ????, Khamsa) is a symbol used in amulets, charms, jewelry, door entrances, cars, and other places. An alternative Islamic name for this charm is the Hand of Fatima or Eye of Fatima, in reference to Fatima Zahra, the daughter of Muhammed. An alternative Jewish name for it is the Hand of Miriam, in reference to Miriam, the sister of Moses and Aaron as well as the Hamesh Hand. It serves as an ancient talismanic way of averting and getting protection from the evil eye, or more generally of providing a “protecting hand” or “Hand of God”. It appears, often in stylised form, as a hand with three fingers raised, and sometimes with two thumbs arranged symmetrically.
http://www.luckymojo.com/hamsahand.html
http://en.wikipedia.org/wiki/Hand_of_Fatima