Was fed up with trying to find the right tools everytime I had to open a Mac (iMacs 21' & 27') to change a HD or install an SSD, for instance. So I ordered the Pro Toolkit. Everything's inside.
Smooth "repair". Not a repair actually, just installing new stuff inside.
With the iMac 27' (2009/10), be VERY careful with the fragile connectors while removing the display. I broke one of them, (fortunately not the point of having to replace it, just a little piece of plastic broke).