Klein Tools Ratcheting Pass-Thru Modular Crimper and Pass-Thru Modular Data Plugs, CAT6 (10-Pack) M2O41038KIT - The Home Depot
RJ45 Crimping Tool Ethernet Crimper for Cat6 Cat5 Cat5e RJ45 Pass Through Connectors and RJ12 Ends Comes with 20PCS RJ45 Cat6 Connectors and Replacement Blade - Amazon.com
Yankok All-in-One Pass Through Crimper (Crimps RJ45 Pass-Thru and RJ12