The Rob Roberts TSS Raptor Crio Plus 20 Gauge Choke is designed to enhance your wing shooting experience with exceptional performance. Crafted from durable 17-4 PH stainless steel this choke is optimized for use with premium tungsten shot making it a perfect addition to the RRaptor Series. Built on years of research and innovative technology its robust construction ensures reliability and precision. Note that the Raptor TSS choke is intended for use in only one barrel of your shotgun providing superior performance in its specialized design.