The Invector Plus Helix Choke for 12 Gauge shotguns is engineered to transform your shot pattern with innovative spin-control technology. Angled lateral ports inside the choke apply a stabilizing spin to the shot as it exits, creating even pellet distribution throughout the entire pattern. Unlike traditional chokes that concentrate most of the shot in the center, the Helix choke maintains the full diameter of the pattern while eliminating hot cores, holes, and fliers. Each choke features Briley's exclusive Spectrum color-coded band with laser-marked constriction for quick and easy identification. Designed for use with lead shot only, this choke is perfect for those demanding unmatched pattern consistency.