With five, color-coded connectors designed to accommodate hundreds of different solid or stranded wire combinations, WireTwist Wire Connectors offer an economical connector that brings a lot of value in comfort and performance.The fixed, live-action, square-wire spring threads itself as it draws wires into the connector, creating a secure pressure grip. The rugged, thermoplastic shell withstands extreme environments. The deep, wide-throated skirt protects against flashover and turned back strands providing excellent dielectric protection.