i recieved the boker great knight in the mail, its awesome. it was only like 18 dollars, but its pretty good for its price. its a huge dagger shaped liner lock that opens with flipper action. its really big, the blade is over 4 inches. this is a good knife for self defense because of its large size, fast opening, and dagger shape.
http://www.youtube.com/watch?v=wwGuzv7l48g
http://www.youtube.com/watch?v=wwGuzv7l48g