The Rob Roberts RR3 Raptor Invector 20 Gauge Choke is expertly crafted for hunters targeting long-range game such as geese and open water ducks. Engineered with precision the RR3 choke ensures exceptional pattern density enhancing your shooting performance when used with suitable loads. Constructed from durable 17-4 PH stainless steel it represents years of meticulous product development and cutting-edge technology. Note that this choke is intended for use in only one barrel of your shotgun optimizing its design for singular efficiency.