The patented CST-1i Cyclops Wire Stripper is the perfect tool for removing the outer insulation from all unshielded and shielded twisted pair and multicore cables. This wire stripper features the following: Strips insulation off of cables that are 1/8" - 3/8" (3.2mm - 9.6mm) in diameter Self-adjusting blade strips PVC, plenum, and other types of insulation quickly and easily Safely strips insulation without damaging inner braids, foils, or conductors of cables