The tool for oil pump tube.
I have no experience with this, but just happen to come across it. I’d think it would be easy to make for the knowledge and right tools. Or improvising with common tools and hammer. LOL
https://www.amazon.com/dp/B004A69QI2?tag=wranglerorg-20
View attachment 509666
A 5/8" split collar, a piece of 3/8" steel rod, some bendin', and some weldin' seems like it would work pretty good, too, at 1/10th the cost.
Edited because linky no worky.