Ethernet and Phone Plug Compatibility - The RJ45 Crimp Tool is a durable, multi-purpose tool for trimming 8P8C and 6P6C modular connectors, RJ45 Cat6 Cat6a Cat5e Cat5 connector ends, and RJ12 connectors (except AMP). Ideal for terminating customized Ethernet patch cords and different lengths of telephone cables. PRECISION CRIMPING - The professional crimping die kit enables the Ethernet crimping tool to precisely crimp the pins of the plug, pierce the insulation of the mesh cable, and secure each stranded wire into the RJ45 connector, thus making the connection between the copper wire and the connector. Comes with Replaceable Blades - The pass-through rj45 crimping tool comes with replaceable blades. RJ45 Cat6 Connectors - There are 20 RJ45 connectors included in the RJ45 Crimp Tool. Support cat6 cat5 cat5e 24AWG~26AWG network cable.