For more than 100 years, the Hubbell name has been synonymous with innovation. as a pioneer in the development of new technologies, Hubbell wiring device has always strived to improve performance safety, and functionality across our entire product line many Hubbell innovations have become the industry standard for protecting people, increasing value and extending product life cycle for maximum sustainability. Insulgrip® is yet another example of a Hubbell innovation that has become the industry standard. Insulgrip® products are synonymous with Hubbell's ongoing commitment to discovering ways to make products safer and Last longer. By encasing wiring devices in tough nylon housings, Insulgrip® devices ensure high impact, heat, and chemical resistance While insulating current carrying components from the user for maximum safety. Insulgrip® cord gripping design clamps conductors, not just the cable jacket, making it the industry's most powerful cord grip with superior strain relief. Each Insulgrip® device is manufactured with roomy, separate wiring chambers to insulate conductors and an individually molded face to keep out dust and debris that can cause contamination over time.