Greenlee Communications 1822 Universal Round Cable Slitter, 0.18 - 1-Inch Precision stripping and slitting of rubber, PVC, nylon and most insulation materials Adjustable depth of cut up to .18" (4.5mm) thick insulation Circumferential, longitudinal and spiral cuts, cable supported during use Cable support arm can be used to pry off thick insulation Spare blade included, great tool for mid-point taps