Wut? Yeah, Znap. I didn't know either until I was browsing through the Bricklink catalog a few years ago. Turns out it's sort of Technic compatible and an attempt to compete with K'nex. But it failed because that was like 20 years ago. The pieces are still available for a few pennies on the secondary market.
And why would you buy the pieces? I got my hands on a few of them and gave them some Dag style tests.