"If you're having trouble, listen.
First of all, look at the metal bar inside the grip itself. It is EXTREMELY hard to screw if you don't do this.
There are two rings, and both feel like rubber. REMOVE THESE! The first one should come off pretty easily, the other one you may need a screwdriver or some other tool with a tiny tip. It screw on and off and extremely easy after you take these out!
Other than that, a fantastic grip!"