Xcelite 2CR Red 2-Step Coaxial Blade Replacement Cassette works with the red two-step coaxial wire stripper, which strips single or double-shielded coax cables (RG178 to RG6, 0.10" to 0.30", 1.87-7.6mm) for solder style, wrench tight or screw-on type connectors. It has a step two dimension of .24" (6mm) and covers strip lengths of 7/32" to 1/4"