Does anyone have any info on Krieghoff disassembly/hammer compression tools? I've heard there might be a few different types made by different people. I've seen one type in Kay Ohye's video, and another type (I think on here in a different thread) that appeared to have two different rods that screwed in to rest against the hammers.

Anyone know who makes them, the pros/cons of different variants, and where they can be found for sale?