The New Medium Size Kershaw 7007CU Natrix Medium Sub-Frame Lock Knife Copper Stonewash Plain Edge. The warncliff point blade updated to D2 blade steel offers a versatile cutting edge that is easy to sharpen and maintain. It has a copper handle scale is 3D machined and chamfered to fit perfectly in the hand. The sub-frame lock design provides secure blade lock up while reducing weight for ease of carry. A Reversible custom designed deep-carry pocket clip finishes off the ZT inspired design. Manual opening and an integral flipper offer rapid blade deployment.