This S45-C110 Installer Series Dual-Cavity Crimp Tool from Simply45 is for use with STP/UTP standard and pass-through RJ45 and RJ11/12 connectors. It is a professional tool designed for voice and data terminations, and the parallel crimping action delivers straight, inline motion for consistent plug pin seating. It features a built-in cutter and stripper. It also includes a push-button tool handle lock.