The Knox Company has developed a new Knox FDC plug with Swivel-Guard that covers the entire swivel connection. Since the Swivel-Guard covers the entire swivel connection, it minimizes the potential of the connection being stolen. With Swivel-Guard, the set screw is no longer accessible making it more difficult to remove the brass connection.
The locking FDC plug with Swivel-Guard still provides protection against thread damage, and prevents trash and debris from being lodged into uncovered connections. The Knox FDC plug with Swivel-Guard is designed for a 2-1/2
