This is the Modular Crimping Tool for RJ9, RJ10, and RJ22 This modular crimp tool will terminate stranded or solid cable and will cut, strip, and crimp your cable. It is features a hardened steel frame that is lightweight and durable. To prevent damage to the plug and tool, the crimping tool must be carefully matched to the plug being attached. As the die compresses, these teeth force the plug contacts down into the conductors of the cable being terminated, permanently attaching the plug to the cable. The Modular Crimping Tool for RJ9, RJ10, and RJ22 is the best solution for crimping handset plugs 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.