Originally Posted By: Roarmeister
Doug, can you explain what you mean by "common folding knives with a bias toward closure"? I've never heard that terminology before.

Hi,
Do you know/have used a lock back knife, like a buck folding knife?

When you open the knife a little, say 10-20 degrees, its snaps back shut.
It wants to stay closed.
It has bias toward closure.
If you shake the knife a little the blade doesn't open.

See 26339.attach