The Overclocker Cafe' have just finished up it's review of the ThermalRight SK6. Here is an excerpt:

    The clip is a pretty straight forward looking latch job at a glance. But only at a glance. We really need to applaud the engineers over at ThermalRight. One of the catches has an elbow, so that when you go to latch it down with a screwdriver you can actually manipulate the catch back and forth on and off of the mainboard catch to avoid the entire fishing in a second screwdriver thing. We found the clip to work one hell of a lot better then it looked to us initially.