High-Purity Purple Copper provides cleaner and clearer sound compared to lesser coppers or brass used in other "premium" connectors. Pure "Hanging" Silver plating directly over Purple Copper - no sound-damaging in-between nickel. Cold-Weld System connections sound clearly better than solder. Slide the plug onto the stripped conductor. Use the supplied Allen tool to tighten the screws, creating an optimized connection between plug and conductor.