Razorlite™ EDC 3.5″ Drop Point Blue Handle Folding Knife (RLU-40C) by Outdoor Edge®. With Replacement Blades. 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.