Klein'S Data and Telephone Plugs Are Professional-Grade and Deliver Consistent, Reliable Performance. Our Thick 50 Micro-Inch Gold Plating On Contacts Prevent Erosion and Extended Connector Life. The Three-Pronged Contacts Provide More Reliable Connections With Solid and Stranded Wire. The Plug Is Housed In A Durable Resin With A Spring Clip. Expect A Sure Connection Each and Every Time.