whats this ?

[GOPAPA]

When I was a kid of around 11 -12 years old I fixed my own bike chains ,, I had a master link and I would take links out or add them depending what bike I was working on.. I had 4 bikes at the same time .. I was the street dealer on bikes in the old sawmill town I lived in where my dad worked at the mill.. lived in company houses . would lay the bike on its side and install the chain in and around the frame and use a old chunk of rail road piece my dad had and put the link together and hammer the pins with a hammer on the out side of the link side to keep them together.. then loosen the rear wheel up from the frame and install the chain and then slide the wheel back to tighten the chain .. been many a years since I did this.. I never had the tool shown above ,,can not remember ever seeing one .. it would of been usefull in my younger days .