Carlson's Cremator choke tubes are equipped with the innovative triple shot technology (TST). TST features a series of three graduated rings in the taper section, which provides a smoother transition from the shotgun bore to the final constriction. This design minimizes pellet deformation, reduces flyers and creates denser patterns, making the Cremator series highly effective for waterfowl hunting throughout the season. The series works with all steel shot sizes and speeds in any of the three constrictions. Additionally, the extended choke tube provides a 25% longer parallel section, delivering tighter and more consistent patterns. It also offers wrench less installation, easy removal and muzzle protection. Available in both ported and non ported options, Carlson's Cremator choke tubes are precision machined from heat treated 17-4 stainless steel, made in the USA.