Outdoor Edge Razor EDC Lite, Folding Knife, Plain Edge, 3.5 Blades, 420J2 Stainless Steel, Blue and Black Handle, Includes (6) Drop Point Blades RLU-40C This is the sharpest" strongest" replacement razor-blade knife available" with blades that change safely and easily at the push of a button. The black-oxide coated blade holder supports the razor-blade for the strength of a standard knife and sharpness of a surgeon's scalpel. The 3.5" Japanese 420J2 stainless razor-blades are precisely heat treated and hand finished shaving-sharp.