I bough this kit an another that had the exact same description but this kit was more expensive. The difference is, this kit has stainless steel fasteners, the other kit has aluminum fasteners that are extremely soft and hard to work with. As another reviewer mentioned, use pliers to bend a loop on the opposite end of the hook, after you slip the disk on. This gives you something to grip and allows a frame of reference for where the hook is, so you can easily grip the edge of the panel.
Con: A week after installation, I notice rust forming around the screen where it was poorly coated. I can't see it from the ground but I know it's there and it bothers me.