Whack'emGood is right about this tool, I purchased one a couple of years ago and it's saved countless cranks for me both under and above the water. Most noteable save was my partners errant cast that ended up in a tree about 10' up, another time we used it to rescue a hooked water fowl that was fairly large and aggressive, I also have used it to retrieve a crank from a laydown that had several limbs and impossible to reach without this tool. I store mine in the rod box, always ready to retrieve.
Good tip on locking the screw that holds the spiral tip on, I'll have to try this.