The Rob Roberts Raptor Biz Choke for 12 Gauge shotguns is crafted from high-quality 17-4 PH stainless steel offering exceptional durability and performance. Specially designed for use with bismuth shot shells this choke is a robust addition to the Raptor Series reflecting years of product development and advanced technological innovations. Its unique construction ensures optimal shot patterns and improved accuracy making it a valuable accessory for any shooting enthusiast. Note that its design accommodates only single-barrel placement enhancing its precision and effectiveness.