Carlson's Cremator choke tubes maximize the performance of today's premium shotgun ammunition. They feature Triple Shot Technology, allowing a more gradual transition from the shotgun bore to maximum constriction. This lessens pellet deformation and creates a shortened shot string with few flyers. The tubes are constructed from 17-4 stainless steel, and are ported to reduce muzzle jump and recoil. They install without a wrench and are easy to remove.