The rectangle you see is just a small metal piece. I actually used a neodymium magnet out of a harddrive (about an 1-1/8" long by 1/2" arched) it is strong and gives me a good snap to keep the lid shut.
hope that helps.
Got the case from tandy, stock Image is a little larger than the case. It went together well and the only thing I would change about it would be to a suede liner inside for cosmetic purposes.