I don't know if you're aware of this LostCause, or if you care, but I just thought I'd mention that the double-edged/dagger style Cold Steel push daggers are only ground on one side. In pictures online the double-edge ground side is often the only side shown, including on the Cold Steel website. I imagine it comes as a bit of a surprise when people who don't know this unbox their CS push dagger for the first time.
It's the same with the CS Counter Tac series (only ground on one side). And that is the reason I never bought a Counter Tac.
Here is a pic of the "opposite" side of the CS double-edged push daggers. My understanding is that this side is ground slightly concave.