It looks similar because there is about only one way to make them. Dan Bethea made the tool you mention. I have made a couple of tools, one to see how it would work. The first tool I used mild threaded rod and standard nuts to do the pulling. It stripped out after the second pin I pulled. This tool is the way I wanted to make it to begin with, but didn't want to shell out the money for the hardened metric threaded rod. I wasn't totally sure would work well. The connecting nuts I used nissan lug nuts with the rounded edge cut off. They're hardened along with the rod. This will last compared to some. If you want to make one, the pics show the exploded view, if not I have 2 already made up. I would have bought one of dan's tools, but he didn't have any made up. So I decided to make one myself with quality materials.
