The Platinum Tools EZ-RJ45 CAT6 Connector and Strain Relief Combo Kit lets you quickly terminate up to thirty Cat 6 cables. This kit comes with connectors that have thru holes so you can easily verify the proper wiring order. To improve electrical performance, the connector pulls the cable jacket tightly in the back, reducing the distance between the wire twists and contacts. Strain reliefs are included for securing the rear of the connector and also help maintain the bend radius of the cable. Furthermore, Platinum Tools has provided strain reliefs in the colors red, blue, and gray to help identify your cables.