Any adaptor can be created on the spot, in just seconds. Simply screw any combination of 24 connectors to one of the 6 Universal Interfaces. No soldering or crimping is needed so connectors can be used over and over again in different combinations. All contacts are gold-plated. Connector bodies are silver plated, machined brass with teflon insulation. The zippered, soft leather case protects and organizes the collection.