Norden Category 6 UTP punch down keystone Jack gives optimum protection from electromagnetic interference from an outside source. These Jacks are designed to reduce the Insertion loss & alien cross talk in order to provide maximum flexibility and high performance for all 10G Ethernet applications and are available in a 90° orientation with back interconnection of Dual Style IDC blocks in universal pin/pair assignment. 90° orientation provides perfect termination .This is tested to 250 MHz range over 100m and supports T568 A&B wiring & easy installation. The Jack is manufactured with an integral cable strain relief. They can be installed into a number of faceplates and unloaded shuttered modules and backward Compatible with category 5e/class D system components.