If I unscrew it it just spins all the way out the jaws don't open but I can pull apart easily with it unscrewed but can't pull open if screwed in,the part of the jaws that open on the inside of it where the screw part is seems like there should be something there to help with the jaws to open maybe not? There is nothing there hope you can under stand my bla bla bla Try this one Sorry guys that wasn't mine that was a pic I got off Internet this is mine I'll check the spring tomorrow and let ya know my findings thx.