Everything comes in the package, 3 hook and 1 hook as well. The 3 hook clips are for Pentium 4's only, as they have a much better mounting system than the Athlon XP when it comes to gigantic, heavyweight pure copper heatsinks. You can only use a single (read: 1!) 1-hook clip to mount it when using the athlon. It holds, I've used it. But it kind of makes the heatsink tilt downward due to gravity when your mid-tower case is standing up because it's only one clip after all. It's a tight clip and it certainly will work but when moving the computer it's very highly likely it could get bent or lose its shape and the heavy heatsink could fall out. So use caution with it. I've never read reviews on it, but I agree, shame on TT for that, or perhaps shame on AMD, your choice.
Censorship makes us so much more creative.