Carlson's Cremator choke tubes maximize the performance of today's high-end shotgun ammunition. They feature Triple Shot technology, allowing for a smoother transition from the shotgun bore to the maximum constriction. This reduces pellet deformation and creates a shorter shot string with minimal flyers. The tubes are constructed from 17-4 stainless steel and come with ports to reduce muzzle jump and recoil. They install without a key and are easy to remove.