The included clip instead of a slot for a screwdriver is suppose to make installing this heatsink far easier. And it really is once you figure it out. My first try I found that the clip went back inside when I was attaching the other side so I learned I had to hold the clip so it wouldn't play hide and seek again as I connected the other side. Even then I couldn't get the clip connected properly by pressing on it. I had to use a screwdriver to hold the clip away from the heatsink as I pressed on it. And then it was easy. Just a simple trick you may or may not have to do but I had to on an Epox 8kta3 and an Abit KT7. Good thing about using the clip instead of inserting a screwdriver to install the heatsink is you don't have to worry about the screwdriver slipping and damaging the mobo.

The next pic you can see more of the micro-fins that many heatsink makers are using these days. The fins are all sold copper.