First this took me awhile to get right, the two brackets that came with the Cooler were put together backwards which kept giving me a hard time while installing. Finally I fixed that problem to uncover another.
I installed the back plate to the two brackets. I than put on thermal paste, and set the cooler on top of the CPU. Lastly I put the tension bar across and screwed in the thumb screws. Finishing screwing it in with a screw driver.
It in there solid, but I can move it slightly to the left, and right.
The CPU is a i5 2005k. The motherboard is a ASUS LGA 1155 - Z68 - PCIe 3.0 and UEFI BIOS Intel Z68