This is a TruGlo Gobble Stopper Extreme Choke Tube for 12 Gauge Invector Plus, Super Supreme. TruGlo's best selling turkey choke! Precision-machined ported turkey tube. Accepts all turkey loads, including Hevi-Shot. Wrench-free installation. No steel shot. Endorsed by the National Wild Turkey Federation. This choke tube is for Browning Invector Plus, Winchester Super X2/X3/Supreme, and Sako/Tikka shotguns.