[4SECA]

The problem with all of the tools I have seen is that they do not have dog ears to keep them for slipping off in use. It's pretty hard to keep them straight and apply that kind of torque.

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxx

The problem of slipping off / keeping it straight does not exist with DPS tool .
One hand holds the handle and one hand spinns either of the twin hammers. The car / spinner supports the other ond of the tool.

No real skill required to operate.
I'm not knocking hammers,but I think this is better.