Those ton knives aren't flippers though.
I picked this set up at Walmart for $20 but I'm going to return it. http://www.walmart.com/ip/Kershaw-Limited-Edition-3-Piece-Knife-Set/33455736
It's the Swerve and the Freefall.
Both fold out poorly. The bearing the blade is mounted on is very gummy. The Liner-Lock has a very poor design. It's flush with the opposite side of the handle, and no little grippy bumps on it to Slide it over with your thumb. I have to use to hands to close it. There is a secondary partial locking bump on the liner-lock too that seems to just be in the way.
Yeah those are cheap-o versions exclusive to Wal-mart. The "real" Swerve and Freefall are much better. I bought them to check them out. Suppose it's worth the money maybe. Was gonna try and take them apart and try and smooth things out with some sandpaper but the dang screws were so tight I ruined a craftsman driver.