The Rob Roberts Final Strut ProBore 12 GA is a meticulously engineered choke designed to enhance your shooting experience. Crafted from durable 174 PH U.S. Stainless Steel this choke is a standout in the RRaptor Series known for its innovative design and advanced technology. With a constriction diameter of .660 it's optimized for use with bismuth shot shells delivering superior performance. The choke's design is specifically tailored for single-barrel use ensuring precision and consistency in every shot. Ideal for hunters and shooting enthusiasts the Final Strut Choke offers reliability and excellence in the field.