The Leek's Wharncliffe point blade is made of a patent pending composite steel with a spine of 14C28N fused with a cutting edge of CPM-D2. The blade design shows the interface of the two steels. The thing to consider is that, if the entire blade was made of this super steel, it would cost 2 to 3 times what this knife costs. By combining the steels this way, you get all the benefit of the D2 steel, at this fantastic price.
That's the idea behind Kershaw's composite blade knives, including the Composite Leek.
The two steels in Kershaw's composite blade knives retain their individual qualities, yet interact with each other and work in concert. The patent-pending technology that makes the modern composite blade possible delivers exactly the type of steel you need where you need it. The Composite Leek offers the pocket-perfect size and styling of the Ken Onion Leek combined with the high-performance composite blade. It features the same two high-performance steels married in an even higher performance blade. The blade is paired with a carbon fiber handle for durability and good looks.