Originally Posted by
eja_ bottecchia
(As soon as I post this there will be others posting how they have re-used the Missing Link, over and over, without a problem

)
...I have certainly re-used them, but not over and over and over and over. The tool really does make opening and removal easier.
The latest generation of these tools has little jaw hooks going in both directions, so you can both install and remove them.
But they are not especially difficult to install without tools. I'm relatively certain KMC still makes standard, non-peened pin chains.
Their website is very well laid out, and explains which chains are which, in terms of the pins.