Apple MacBook Pro Space Bar Key - Most Problematic of All Time

The metal bars are there to give support but also give the clips from the back of the key cap
something to grab on to, note when installing the key cap the side with the metal bars always
face down so if you can see the full length of the two bars, you have it backwards.
The Second and Third generation space bar key was made of translucent plastic with two rather
heavy duty reinforcement bars at the top and bottom, the fourth generation version went with
a complete metal key which should infect make the key stronger and more reliable, but in
reality this is root of all complaints with MacBook Pro keyboard.
We found the plastic clips from the back of the key to be very fragile and tend to break off from
moderate use, or from heavy pounding of the keys. We note earlier some keyboards were
damaged straight from the factory, so make sure you inspect all legs and clips from the back of
the space key cap, if any of them are damaged or broken off then its time for a replacement as
you do not want to prolong the issue as it may also lead to hinge clip and damage to the entire
keyboard.