Carlson's extended turkey choke extend approximately 1" from the end of the barrel.It is manufactured from 17-4 heat treated stainless steel to withstand heavy buffered turkey shotshells.It also produces extra tight patterns with copper plated and buffered lead turkey shotshells.Constriction Type: TurkeyConfiguration: RetayFinish: BlackConstrictiondiameter: .665Chokes Included: 1Material: 17-4 Stainless Steel