Platinum Connector professional HD form-factor RJ45 crimp tools: Pass-Through crimper makes UTP/FTP Cable connector assembly much easier and rock solid (Blue) - - Amazon.com
RJ45 Crimp Tool with Cat6 Pass through Shielded/transparent Connectors 20PCS and 5Pack 8Pin blades for Pass Through Cat5 Cat5e Cat6 RJ45/RJ12 Regular and End Pass Through connectors - - Amazon.com