I feel like I knew what this thing was right up until I had one. Two tool id site had no idea, and one said it's a ball joint separator, but I can't find any that look like this, and I swear I've seen them in stores, but can't remember where.
Maybe a type of bearing press?
If anyone wants to learn how it is done here’s a good vid on the subject: https://youtu.be/_Tm6N5l69_c
Great vid, thanks for sharing!