Manufactured from 17-4 heat treated stainless steel to withstand heavy buffered turkey shotshells. This choke tube produces extra tight patterns with copper plated and buffered lead turkey shotshells. These chokes produce dense patterns and carry a lifetime warranty. Our Extended Turkey Choke extends approximately 1" from the end of the barrel. These chokes have a matte blue finish and should not be used with steel shot. These choke tubes are backed by Carlson's Lifetime Warranty and are made in the USA!