This heat sink has one of the most unique designs I've ever seen, with dual NMB 60mm fans and a refrigerant filled radiator, how can you go wrong? Then it's all held together with a hard plastic shell. The clips are made of plastic as well, each side of the clip is two pieces. The unit as a whole is rather large, and bigger than any unit I've tested before. I was very nervous when I finally began the installation and I was also glad that I kept my new Duron CPU in one piece after the nightmares I'd heard before.