These chokes feature our brand new Triple Shot Technology. TST is a series of three graduated rings in the taper section of the choke tube, that allow a more gradual transition from the shotgun bore to the final constriction. The Cremator series conveys a host of benefits to the shooter, like reduced pellet deformation, less flyers, and denser patterns. These choke tubes are non-ported.You also get all the benefits of an extended choke tube, including a 25% longer parallel section for tighter and more dense patterns, wrench-less installation and quick removal, and muzzle protection. They are offered in your choice of ported or non-ported configurations, with a matte black finish. Like all of our tubes, the Cremator series carries a lifetime warranty, and are constructed out of our premium 17-4 stainless steel.