Hi Gecko, sorry, the little bear is still learning how to present the tool he watches over.
No staples Peter, he just had this firm grip on the box, quite the "clinger".
Here he is showing what's inside the box, as you can see he's reading the instructions upside down, i think that's very clever....
and here is a link showing how to use it;
https://www.youtube.com/watch?v=LrC6qtoLCRo
And one that explains why this tool is the BIZ;
https://www.youtube.com/watch?v=lYaacze91Fg
As Dave has mentioned there are shortcomings in the average youtube video's.
If you are splitting the old chain did now advises to grind the pin flush with the surface of the link ( don't use a master link to split the old chain, the hole in the center of the pin does not provide optimal surface contact to push the old pin out the back of the link ) to avoid unnessary pressure on the tool's extraction pin, i have always done that intuitively too.
The chain master link's lifespan relies on full lubrication of the pins inside the links, i prefer to coat in-and outside surfaces with the grease provided in the masterlink kit and also close off the ends of the links with your thumb as you push the pin part of the link through to maintain as much grease inside the link tubes as the grease slowly works it's way back past the pin by the pressure you push the link through the chain.
The best part of the tool is the guidance it provides when pushing the connection plate ( with the text on the outside ) home in the correct with to align with the other links so as to not over compress the link plate and squash the x-rings under it, the slot in the tool's compression push plate stops on the protruding pins when the correct seating depth has been achieved, it has been purposely engineered that way.
And the hardest test is the last part of the operation where the pins are expanded at the end to make sure the link is reliably installed as designed without the risk of coming apart.
All these features have been carefully engineered that way and that is what you pay for in a convenient package crafted from Japanese high quality steel.
And as John has explained it is good practice to check your work after you have finished, the best and last part of any job is to confirm the work has been tested and verified correctly as shown at the end of the video.
Hope we touched on the most important points and great thanks to Mr Houtman's generous offer.