The idea of this puller is to combine several functions: a reverse hammer, universal tuning and tricky hooks. For the manufacture of the main part you need to use good steel, so a broken wrench made of chrome vanadium steel will do just fine for this. You can make a tool with locksmith skills yourself.
With the help of a manufactured puller, it is possible to get bearings from hard-to-reach places, with a cage of different sizes thanks to the adjustment.