Kershaw 5150 Lucha Balisong Butterfly Knife Stainless Steel Stonewash Plain Edge. Kershaw is known for its fast and smooth operating folders, but for the first time ever, they have taken all they know about knives and applied that knowledge to a balisong. Introducing the Lucha! It features stainless steel handles with internal stop pins and a latch lock, and a Sandvik 14C28N blade. The pivots run on KVT ball bearings for lightning fast flipping and buttery smooth movement.