The Carlson 12 Gauge Turkey Fabarm Exis HP .650 Ext is manufactured from 17-4 heat treated stainless steel to withstand heavy buffered Turkey Shotshells. These choke tubes produce extra tight patterns with copper plated and buffered lead turkey shotshells. These chokes produce dense patterns and carry a lifetime warranty. Carlson's Extended Turkey Chokes extend approximately 1 inch from the end of the barrel. These chokes come with a matte black finish and�have a 1.050 inch parallel section to produce the optimum pattern with your shotgun.