IDEAL® Wing-Nut® 30-652 452 Flame-Retardant Twist-On Wire Connector, Contoured Winged Shell Style, Live Action/Square Wire Spring, 18 to 8 AWG Wire, Aluminum/Copper Wire, Thermoplastic Polyester/Steel

Wing-Nut® Wire Connector provides an easy, secure grip when connecting a wide range of wires. The specially designed contoured wings make for extra torque and quick work on any electrical job. The wide range, live-action spring is flexible enough to handle small combinations with ease but then expands to accept large combinations when you need it. It can also be reused on same size or larger combinations for quick and easy circuit changes and additions.