The Rob Roberts TSS Raptor Mobil 12 Gauge Choke is engineered for superior performance in wing shooting when paired with premium tungsten shot. Part of the RRaptor Series this choke is the result of extensive product development and innovation utilizing cutting-edge technology. Crafted from durable 17-4 PH stainless steel it promises robustness and reliability. Note that this choke is designed for placement in a single barrel only reflecting its specialized design.