"Fixed Blade".
Any blade lock can fail, no matter what the manufacturer claims. If you're that worried about a knife folding on your fingers, get one that doesn't have the blade broken in the middle for a hinge.
I don't know what your doing with your folding knives, but unless you're stabbing cars, use them to do pull-ups, climb a building, or are trying to cut or slice something with the spine ...
I've used Buck and Schrade/Old Timer lockbacks, along with friction folders like MAM and Opinel, and slipjoints for 60 years. I've never had a blade attempt to close on my fingers. When using a folding knife to cut something, the cutting action forces the blade open, not closed.
I've never had the backlock on a Buck 110/112 or Schrade Old Timer 6OT/7OT, or Uncle Henry LB7 fail. Even if it did while I was cutting or slicing something, it would only open farther, not close.
The only time a folding knife closes is when you apply pressure to the spine, with no pressure on the edge.