IDEAL® Twister® Wire Connectors handle a wide range of common wiring configurations for residential construction projects with comfort and ease. They boast quick take-up on even the toughest combinations including solid-to-stranded. Their expanding, live-action square-cut spring ensures a fast, secure connection and smooth twisting. Constructed with a copolymer shell that expands for smooth, progressive tightening, Twister® connectors feature a swept-wing design to ensure comfort and provide extra leverage.