The Simply45 Professional LAN Cable Stripper is a patented easy-to-use professional LAN cable stripper that is adjustable to professionally strip both unshielded (UTP) and shielded (STP) copper LAN cables. The S45-S01BL easily strips Cat7a, Cat7, Cat6a, Cat6, Cat5e, Cat3 shielded and unshielded networking cables. This is a must-have in every installers tool kit.