Hi, I have been going through a bag of assorted crochet hooks and have found one which is like none of the other ones. It is plastic and has a hook at one end but the hook has a vertical slit down the side. It is also blunt at the top, and has a hole drilled through the hook at the other end. I have attached pictures of the hook as that will be easier to see than my description. I have assumed that this is for crocheting of some sort, as in a bag of crochet hooks, but might not be. I Was wondering if anyone had seen a hook like this before, or knew what it is for?