This is a one-off full custom Andrew Demko AD15 that sports the Scorpion Lock, an easily one hand operable backlock and the strongest lock Demko has made. It has a fully-polished dagger grind blade in Twist Damasteel but what really makes it unique is the thickness. In the 4th photo, it's the top knife and the bottom is normal custom AD15. Andrew turned a massively overbuilt model into something more reasonable for EDC, while still retaining that solidity. He slimmed it down and rounded the edges. The Scorpion Lock as strong as the Tri-AD, even stronger when gripped (force on the handle presses the lock farther in, like a framelock), and has a secondary lock (on the hand ground customs). Usually, the secondary lock can only be engaged when the blade is open. Only on this one, does it also functions as a safety when closed. The scales are solid carbon fiber with a peel-ply texture and polished edges. Andrew has never made another like it. Fit and finish is perfect.