Extra locking mechanisms like the Benchmade 581...?

[72jroberts]

So part of my shift at the hospital today was at the psychiatric ward, so, no knives. Kinda felt nekkid. Recently I purchased a Benchmade 581 which is a wonderful knife. That one has an extra locking mechanism perfect for using in case of a snatch-away by an unauthorized person. Are there other knives out there with an extra locking mechanism?
Thanks,
John

 

[mrdeus]

Many assisted opening knives have safeties.

 

[viper89]

The Kershaw Leek and many other assisted knives have a safety that stops the blade from deploying. SOG Flash and Aegis series also have safeties.