Choose the reason to fold
A folder can add a second cutting tool to a preparedness kit and serve ordinary jobs when carrying the main fixed blade is inconvenient. That may make it the knife you have available for ordinary cutting jobs. Its usefulness does not require treating it as a substitute for every fixed-blade task.
Inspect the mechanism, not just the blade
Understand how the knife opens and locks, what areas collect debris and what maintenance the maker allows. A lock’s name does not establish a universal strength ranking. Springs, pivots and fasteners are design details to understand, rather than reasons to declare every folder unreliable.
Think about support before you need it
Check the manufacturer’s instructions for cleaning, adjustment and service. An accessible screw is not necessarily permission to disassemble the knife. If parts or special drivers are needed, learn that while support is available. Avoid making a working knife dependent on modifications you cannot maintain.
Apply the same edge and care decisions
The considerations for steel, sharpening and corrosion still apply. Favor a knife whose operation you understand and whose edge you can maintain. Keep its use within its intended cutting tasks. The examples below are folding knives with documented locking mechanisms; they are not ranked by predicted service life.
Know the mechanism, maintain the edge, and respect the knife’s limits.