This is the Professional Grade Modular Crimping Tool for RJ11, RJ12, and RJ45. This Crimp Tool is a professional grade Modular crimp tool with a hardened steel frame, for lightweight durability. The Professional Grade Modular Crimp Tool will terminate modular plugs on stranded or solid cable The Professional Grade Modular Crimping Tool for RJ45, RJ12 cable, and RJ11 connectors is the perfect tool for all your cabling projects. For more information on our products please contact our customer service department at 888-519-9505 For all your cable and connector needs choose Show Me Cables.