Microtech's Combat Troodon is a large OTF production knife named after the Troodon dinosaur. The Combat Troodon is really large! Despite the size of this knife, the handle feels slim and comfortable. The handle is T-6 anodized aluminum, and the knife also comes with a tungsten glass breaker.

Sources:
Part 1 - John Wick Chapter 2: Knife Fight
Part 2 - Microtech Combat Troodon -- John Wick's Knife! | Doctor Frunkey
Part 3 - Microtech Combat Troodon Torture Test | X-RING