The BLUE RBC-1250 Replacement Blade Cartridge works with the CPT and Super CPT-series coax cable strippers on RG6 and RG59 cable. It cuts braid and dielectric to .125" (3.2mm) and exposes the center conductor to .25" (6.4mm) with stop. The hardened, tool-steel blades ensure optimum performance over a long life. Each cartridge can prepare 2500 to 5000 cables, depending on braid coverage. The cartridge snaps easily into place.