CRKT S-2, their old discontinued attempt at a state of the art sebenza type titanium framelock and ats-34 blade steel.
Too expensive for them to keep making and stay competitive with.
I have the medium one and since I moved up to a real sebenza, made this one into a gentleman's folder and removed the rough clip and thumbstud, and added a lanyard.
It brought out it's sleek lines and thin profile, I recommend all medium and small S-2 owners do this.