Spyderco C134CFP2 Bradley 2 Spyderco Bradley 2 Carbon Fiber Plain Edge. Features a 3 5/8" plain edge blade of CPM M4 tool steel. Skeletonized full stainless steel liners. Linerlock. Carbon Fiber /G-10 laminate scales. Pocket clip. Drilled and tapped on all four corners. Tiachung NOTE: CPM M4 tool steel, while considered by many as a superior blade steel, is NOT Stainless. Proper care must be used to maintain the finish. Rusting and Staining are normal with this tool steel. It is not a defect, but simply the nature of the steel.