These are the Gold Plated Metal Spade Plug Connectors in Black and Red. The connectors are made with sturdy, gold plated metal and have black and red bands to make it easy to identify your speaker connections. It can accept speaker wire between 12 and 18 gauge and utilizes a tool-less, screw-crimp installation style. Start by stripping back the cable jacket from your speaker wire. Then strip the individual wires. Unscrew each of the spade plugs and insert the base of the housing over the wire. Then, fan out the conductors around the rim. Make sure the conductors do not overlap with the threads of the connector. Then screw the spade back together. The Gold Plated Metal Spade Plug Connectors will simplify your home theater setup and provide crisp audio fidelity.