Why NSi? With industry leading service and a 99% same day ship rate, our contractor-preferred brands can be relied upon to arrive at your local distributor on time. NSis line of electrical products and our knowledgeable Tech Team covers the needs of contractors every day. And with industry leading brands such as Polaris™, TORK®, Easy-Twist™ and Easy-Wrap™, NSi products offer quality solutions to contractors and electricians.