The Carlson's Choke Tubes 09223 Bismuth Bone Buster Rem Choke 20 Gauge Extended Range 17-4 Stainless Steel delivers a precision-built extension to your Remington Rem setup, featuring a 17-4 stainless steel construction that withstands demanding field conditions while providing dependable performance. Designed with a .040 constriction in an extended range configuration, this choke tube is crafted to optimize shot patterns for the 20 gauge platform, giving you improved density at longer distances without sacrificing close-quarters performance. The Rem Choke profile ensures seamless compatibility with your existing shotgun threading, letting you install this choke quickly for trusted, repeatable results in both field and range scenarios. With a single choke included, you can tailor your setup to tighter or more open patterns depending on your quarry and shooting discipline, all while the Bismuth Bone Buster branding signals a focus on precision pellet dispersion and bone-penetrating effectiveness at extended ranges. Built for rugged reliability, Carlsons 17-4 stainless steel construction delivers durable corrosion resistance and consistent performance shot after shot.