My dad gave me a Schrade knife but I don't know what kind it is. It is 4 inches long when closed, has a 3 inch blade on it. At its widest point it is 1 1/2 inches wide. There is a long pointy thing on the outside of the knife that opens up. Someone said it is to untye knots. On the blade is Schrade USA 735 S.S. Does it have a name? And what is the pointy thing for? What is the price range on it? Any info appreciated. Thanks