The Carlsons 56612 is a choke manufactured in the USA, specifically designed for compatibility with Beretta/Benelli Mobil shotguns. This product allows for usage of Steel, Lead, and Hevi-Shot, though it's recommended to avoid utilizing Steel shot exceeding the size of #BB or with speeds beyond 1550 fps in choke tubes with full tightness. Notably, the Carlsons 56612 is comprised of robust 17-4 heat treated stainless steel.