More would like to say that the test of locks on folding knives are really important.
Strength in the normal position is not as important as the quality of the lock.
If the blade break down in axle assembly as Figure 1,
it assumes no harm to the person.
If lock breaks down under load as Figure 2
the person may be injured, which is unacceptable.

I once badly cut his finger with a knife new out of the box -
I had to dig up a hole in the nature in the trunk of the tree to collect sap. The main knife was too blunt.



Be exceptional knife with slip joint and friction folder -
they do not have the lock and man working them very carefully,
knowing that the knife may arise from the failure of the movement.

A knife with a lock means that it is a reliable, almost as fixed
knife, so you can make significant efforts.
But when the blade is formed on the fingers in the most
unexpected moment, it is unpleasant, it should not be.

One of the ways - testing.