whats a wave? like what they were talking about on page 5?
On Ernie Emerson's line of folders, he machined in a hook on the top of the blade like you see on the Scrap Yard "Yard Hook" knife. Emerson called this feature the "Wave." Its purpose is to catch on one's pants pocket when withdrawing the knife. Doing so, opens the knife on the draw and is said to be very fast.
Check out Unsub's picture below, and you can see the wave:
