These are designed to replace the inexpensive brass links that come supplied fitted to your biwire speakers, do yourself a favour and upgrade them to these if you are buying Black II speaker cable. If you’ve a reasonably transparent system, you’ll be shocked at what these do to the music! Most people dismiss this as not important, but whenever someone tries them the feedback is always the same ‘I wish I had done it ages ago’
Owners of the original Black speaker cable can still massively benefit from using these jumpers in their system.
Terminated 4mm Z plug to spade