Twister Wire Connectors have earned a solid reputation as the most technically advanced wire connector available. These superior wire connectors are designed from top to bottom with features to provide more comfort and less fatigue to professional electricians. With swept wings and an expanding, live-action spring, the Twister supports a wide range of common wiring configurations with comfort and ease, even on the toughest combinations like solid-to-stranded. The copolymer shell expands for smooth, progressive tightening ensuring dependable connections.The Twister also features a hexagonal top with a ribbed cap for fast fingertip starts as well as nut driver installation. The tough, flame-retardant shell withstands the most rugged environmental extremes while the deep skirt provides maximum dielectric strength. Additionally, The Twister can easily be removed for repeat use on the same size or larger wire combinations.