The final shipping cooler is mounted on four holes in the motherboard, and the cooler works using a push and turn mechanism. It looks easy, but sometimes it's not.
Sometimes you really have to push so much that your fingers hurt, poor diddums, in an attempt to make the system turn and make it stay.
I have to note that the Intel recommended cooler is actually completely made of aluminium and we all know that this material is not that good as a heat conductor. Intel could use copper, but perhaps copper costs too much.
Apart from this, Intel coolers are very noisy. Enthusiasts know that if they want to get a quiet machine, they have to buy a more expensive and possibly copper based cooler and turn the noise down. µ