Carlson's Extended Turkey Choke Tubes extend approximately 1" from the end of the barrel. They are manufactured from 17-4 heat treated stainless steel and have a matte blue finish. Carlson's Extended Turkey Choke Tubes feature a 1.050" parallel section to produce the optimum pattern with your shotgun. Lead Copperplated Nickel Hevi-Shot or Bismuth may be used in these choke tubes. Comes with "Free" Choke tube wrench!