The Rob Roberts TSS Raptor Invector Plus 12 Gauge choke is crafted from durable 17-4 PH stainless steel providing exceptional performance for wing shooting enthusiasts. Designed specifically for use with premium tungsten shot this choke optimizes shooting precision and effectiveness. Part of the renowned RRaptor Series it reflects years of meticulous product development and cutting-edge technology. Note that the Raptor TSS choke is intended for use in a single barrel only enhancing your shotgun's performance with precision engineering.