From the official “Passion Jewelry” page of the Mel Gibson movie website:
The “Nail” pendants come in two sizes and feature Isaiah 53:5 inscribed on the side. The 20″ cord has a Nail pendant that is 1 7/8″ in length and the 24″ cord has a Nail pendant that is 2 5/8″ in length.
Just $12.99 or $16.99. Check out the jewelry, “Witnessing Tools” and other gifts at the website of official licensed products for Mel Gibson’s The Passion of the Christ.
[As] the late, great comedian Bill Hicks probably said it best when he commented, “A lot of Christians wear crosses around their necks. Do you think when Jesus comes back he ever wants to see a f–in’ cross? It’s kind of like going up to Jackie Onassis with a rifle pendant on.”
Quoted in “The Morning Fix” by Mark Morford (email from SFGate.com).