Review on Whizzotech Repair Replacement Screws For Unibody MacBook Pro Retina 15&#34 by John Carter

Perfect fit for 2011 Mac Air 11" laptop. I was missing 4 screws and was able to replace them in less than a couple of minutes with no problems. One thing to note: there are 2 screw lengths in this package. I don't know why or what for but I couldn't use the longer of the 2 sizes, only the smaller one. There were only 4 smaller sizes in my package. The bottom of my laptop was open and crashing my trackpad. Now it is completely closed and everything works fine.