The 3-Gun choke tubes are manufactured from heat treated 17-4 stainless steel and extend 3/4" out the end of your barrel and are designed to shoot Lead, Steel, TSS, and Hevi-Shot loads. Our 3-Gun Choke Tube Set will also work in other target shooting and hunting situations. You can shoot slugs through these chokes up through the Light Modified Constriction. These chokes are backed by our lifetime warranty and manufactured in the USA!