New! Kershaw's patented composite blade technology plus blackwash?. The first thing you'll notice about this Leek is the Composite Blade. The wavy braze line permanently joins a razor-sharp D2 cutting edge to a Sandvik 14C28N spine. The next thing you'll notice is the new BlackWash finish. With a Composite Blade and BlackWash this is the Leek that has it all.