Triple Shot Technology (TST) with three graduated rings for gradual transition and reduced pellet deformation; Available in close, mid, and long-range constrictions; No size or speed restrictions with steel shot; Extended choke tube with 25% longer parallel section for tighter and more dense patterns; Wrench-less installation and quick removal; Option for ported or non-ported configurations; Made from heat-treated 17-4 stainless steel; Made in the USA