If you look at the position of the Wave when the knife is closed and in the tip up position. You will see that it too is in the up position. When the knife is clipped to inside your right front pocket, the Wave rests against the seam of your pants. As you daw the knife from your pocket, the wave rides up the seam and catches at the top of your pocket. It holds the blade in place as you continue to draw the knife forcing the blade into the open position.