At the risk of repeating others...
Both the Police and Military with G-10 scales over dual steel liners, dissassembable(?) screw construction, plus:
The G-10 Police with a grind that makes for a stronger tip (compared to the flat ground G-10 Police).
The Military with anything but a liner lock.
-OR-
The current SS (or Al or Ti) Police model with a reasonably durable textured black coating on the handle scales.