If you are DIY'er, these locking bananas are excellent for terminating your speaker cable. They can handle a large cable (7mm opening), hold on to them securely, and not fall out of your amp/receiver once in. What advantage does gold have over silver as a connector plating? Silver is a slightly better conductor, but gold resists corrosion better, giving a longer lasting quality connection without cleaning. Connector specifications are: Body - gold plated brassShell - transparentCable hole - 7.0mmConnection - set screw (solderless) ROHS compliant - yes Why use Apollo AV products? All our products are manufactured to the highest quality standards.Lower price vs name brand, not lower performance RoHS compliantAudiophile quality materials and design.Lifetime warranty against manufacturing defects