More power with every twist. IDEAL® Wing-Nut® Wire Connectors are designed with high-leverage wings that provide extra torque for quick work on any electrical job. Featuring a copolymer shell that expands for smooth, progressive tightening, and a square-cut inner spring that firmly grips wire, Wing-Nut® delivers dependable connections on a wide range of wire combinations. In fact, the red, Model 452®, Wing-Nut® will accommodate 2 #18 AWG to 4 #10 AWG wires - the widest range winged connector in the industry.